Insight Meditation, also called the Higher Training in Wisdom, aims at developing the insight to see clearly and compare objectively the true nature of conditioned phenomena, such as the Five Aggregates, with the ultimate reality of the unconditioned phenomenon of Nirvana or Nirodha Dhatu. This is Insight Meditation. It can be best achieved when the mind has already been trained to become pure and firmly concentrated through Concentration Meditation.
There are two levels of Vipassana. The first level is called Preliminary Insight Meditation (Anupassana). It is clear comprehension of the three universal characteristics of all compound phenomena – that they are impermanent, suffering, and non-self (that is, empty and meaningless). These characteristics must be understood in comparison with the opposite characteristics of non-compound phenomena which are eternal, supreme happiness, and ultimate reality. This is the first level of Insight Meditation.
The second level of Insight Meditation (also called Supra-mundane Insight) is detailed contemplation of the Four Noble Truths in three transcendent mental states (ñana): (1) Sacca-ñana (Knowledge of the Truths as they are), (2) Kicca-ñana (Knowledge of the the functions with regard to the respective Four Noble Truths), and (3) Kata-ñana (Knowledge of what has been done with regard to the respective Four Noble Truths).
In Sacca-ñana, the meditator becomes able to see clearly and really know objectively suffering, the arising of suffering, the cessation of suffering, and the path leading to the cessation of suffering.
In Kicca-ñana, he comes to know clearly what he is supposed to do with respect to each of the Four Noble Truths. First, suffering (Dukkha) should be gotten rid of; Second, the cause of suffering (Samudaya) should be abandoned or relinquished; Third, the cessation of suffering (Nirodha) should be clearly realized or penetrated; Fourth, the path (Magga) should be entered upon, practiced, and developed.
Finally, in Kata-ñana, the meditator sees clearly the progress that he has already achieved. This is Gotrabhu-ñana (Knowledge at the moment of Change-of-lineage). From there, if the meditator can cut at least the first three fetters, which are false self concept, doubt and reliance on ineffective rituals, he can immediately experience the non-compound nature of Nirvana.
Preliminary Insight consists of insight into the Three Characteristics or Common Charateristics of all conditioned phenomena, which are impermanenct, suffering, and non-self.

Compound phenomena are made up of visible, physical components and invisible factors which influence birth and development. Everything in this world is compound. There are two main types of compound phenomena – living and non-living. We shall focus on living phenomena, which encompass all the characteristics and factors. Specifically, let’s focus on ourselves, understood as the Five Aggregates of Body, Sensation, Memory, Thought and Recognition.
Like all compound phenomena, we are born, exist for a time, and then die and disintegrate. While in existence, we change, constantly, first growing and then degenerating. We exhibit the three universal characteristics of impermanence (Aniccang), suffering (Dukkhang), and non-self (Anatta). These three qualities are, in fact, only three different perspectives on the same trait – impermanence. With attachment, impermanence is experienced as suffering, because we are inevitably separated from what we love and united with what we detest. Similarly, impermanence implies “Non-self” in the sense of being void of real, permanent essence.
Our rebirth is fundamentally conditioned by ignorance. We want to be reborn because we love it here. It is nourished by the passions: greed or lust, hatred or anger, and delusion or misconception. These passions stimulate wholesome or unwholesome behaviors which produce either beneficial or harmful karmic consequences through actions, words and motives. Good actions, such as making merit, may result in fortunate births, but as long as ignorance remains, rebirth will continue. Three main factors govern our rebirth. They are Karma, consciousness, and craving.
Good or bad resultant Karma (Vipaka Kamma), based on past actions, causes us to be reborn into the happy or suffering worlds. The happy worlds are the Human, Celestial, Brahman and Formless Brahman Worlds. They all provide substantial opportunities for further progress. The suffering worlds are the worlds of Animals, Demons, Hungry Ghosts, and Hell Beings. In these worlds, one is essentially cut off from opportunities for advancement, only paying off debts.
Our consciousness or cognition factor (Viññana) determines what we can see and comprehend. It acts like a seed that flourishes throughout our growth and development. Our craving, whether wholesome or unwholesome, is the life force that propels germination and growth. This presentation has been a brief summary of Conditioned Genesis (Paticcasamupada), which we will study in detail later on.
When a human being dies, it is the coarse human body that we see cease to function. The four mental aggregates and the refined human body, which are all transparent, along with the karmic accumulation from the last lifetime, constitute the microscopic nucleus for a new psycho-physical organism. They all depart together from the crude body as it passes away.
If its virtues, such as generosity (Dana) and morality (Sila), fall into the human range, the nucleus prepares for a human rebirth. It enters the body of the potential father, following the seven-step path that we learn in meditation, and comes to rest at the center of the body. Here, the nucleus can wait up to seven days. Its merits influence the father to have sexual desire for the mother. When the mental aggregates of the father, mother, and baby come together, a human force similar to gravity pulls the baby from the father into the mother as the sperm joins the egg. This is why our mental spheres are at the center of the body.
This is the original microscopic origin of the embryo. The four material essences (Water, Earth, Fire and Wind) develop into the crude meat and bones of the baby’s body, while the four mental elements remain perfectly still and pure, never opening the gate for passion. This is the initial development of the baby’s body and mind.
After birth, the remaining karma will function at its appropriate time. While growing up, the human mind always wanders outside and attaches to worldly objects, which may be good or bad, causing either wholesome or unwholesome effects. The mind may be stirred up or calm, stupid or wise, depraved or virtuous, leading to suffering or happiness. The physical elements (Earth, Fire, Water, and Wind) will be active in the young, causing growth, but less powerful in the elderly, causing the body to degenerate. The hair falls out, the teeth become loose, the skin becomes wrinkled, etc. Thus, we see that the body is impermanent, suffering, and unsatisfactory. In the end, it disintegrates and becomes non-self. In conclusion, we see that the body is void of any permanent, happy, self essence.
We begin with Four Foundations of Mindfulness meditation (Satipatthana) to experience and contemplate the bodies-in-the-body, feelings-in-the-feelings, mind-in-the-mind, and Dhamma-in-the-Dhamma. The meditator develops Jhana (mental absorption) to purify the mind from Hindrances. Once the mind is pure and firmly concentrated, the meditator begins by contemplating the coarse physical human body, observing the five “root” (mula) meditation objects. These are the hair on the head, body hair, finger and toe nails, teeth, and skin.
Let’s take the hair on the head as an example. The meditator takes a single hair from the top of the head and examines it as though under a microscope at the center of the body. He sees the hair as it really is – impure and subject to change, in accordance with the factors influencing it, such as food and environment. With age, it naturally becomes less healthy and may turn grey or white. He or she notes that hair is impermanent. It may fall out, and will ultimately disintegrate, becoming no longer hair. It is, thus, impermanent (Aniccang) and unsatisfactory (Dukkhang). And, it is void of permanent reality or ultimate significance. It is, thus, “Non-self” or Anatta, not the eternal self of anyone.
The same thing can be said for the hair on the body. Similarly, the teeth are impure – bathed in bacteria, smelly, subject to cavities, and apt to break and fall out. So, too, our nails need constant care – cleaning and clipping. The skin is always covered with sweat, needing to be bathed and have its stink covered over with perfumes. All of these body parts are impure, subject to change, unsatisfactory and potential sources of suffering. They are impermanent, without ultimate reality or meaning. This is the true nature of the whole body. From our birth as a baby, we develop until the prime of life, and then degenerate, growing old, suffering, becoming sick, and dying. After examining the physical body, the meditator continues with the four mental aggregates: Sensation, Memory, Thought and Cognition. Ultimately, this leads to clear comprehension that this whole psycho-physical organism is Non-self (Anatta).
Preliminary Insight, thus, leads to comprehending the ultimate reality of the Five Aggregates as suffering and elucidates the cause of suffering as Craving and Attachment. When the meditator can let go, he can experience extinction of suffering, which is Gotarabhu-ñaña. If he meditates further, he may experience Nirvana, which is non-compound and has the characteristics of eternal permanence, supreme peaceful happiness, and ultimate reality. He will, then, be able to compare the characteristics of compound and non-compound phenomena and realize the superiority and accessibility of the latter. This is Right Wisdom (Pañña) which can eventually lead to enlightenment in the Four Noble Truths.