Now let us consider what did the Buddha realize on Vesak ?.On Vesak day
the Supreme Buddha realized the Four Noble Truths which are mentioned in the first
discourse. This discourse, known as the Dhammacakkappavattana Sutta sets forth the basic
eternal truths of life comprehended by the Buddha during his illumination under the Bodhi
tree, and explains them in so clear and direct a manner as to lead the hearer to a similar
understanding.
In the Sutta, the Buddha explains that there are two extremes which
should be avoided. What are they? They are the extreme of self-indulgence and the extreme
of self-mortification. The men who devote themselves to these two extremes, ignoble and
profitless, go astray and fail to perceive the true Dhamma. Abandoning these two extremes,
the Buddha continues, He, the Tathà gata, has discovered the Middle Path (Majjhima
Patipada) which promotes sight and wisdom, and which tends to peace, to higher wisdom,
enlightenment, and Nibbana.
What is this Middle Path discovered and expounded by the Enlightened
One more than two thousand five hundred yeas ago. It is the Noble Eightfold Path, namely
Right Understanding, Right Thoughts, Right speech, Right Action, Right Livelihood, Right
Effort, Right Mindfulness, and Right concentration. The Path is commonly divided into
three factors- such as Sila, Samadhi, Panna (morality, concentration, and wisdom).
By developing these three factors we can eradicate the cause of
suffering and thereby the suffering itself which follows as its consequence. The cause of
suffering the Buddha teaches, as craving (tanha), manifesting itself as the defilements
(kilesa) of the mind . We cannot eradicate craving all at once. But we can eliminate it by
degrees. First we should practice morality, then with morality as our foundation, develop
concentration, (samatha) insight meditation (vipassana).When the mind is filled with
defilements, virtue, concentration and wisdom disappear. When the mind is filled with
virtue, concentration and wisdom, then the defilements disappear. The defilements can be
removed momentarily by efficacy of morality(Sila).They can be removed temporarily by the
efficacy of concentration(Samadhi)and craving, the cause of suffering, can be eradicated
forever by the efficacy of wisdom (panna). The end is unshakeable deliverance of the mind
which is the goal of the Buddhist path, and man who has eradicated all defilements and
achieved the goal is called as Arahat.
According to the discourse, the Buddhist should do four things. What
are they? There are to perceive the Truth of Suffering to eradicate the Truth of its
cause, to realize the Truth of its cessation, which is Nibbana, and practice the Truth of
the path that is leading to the cessation of suffering, which is the Noble Eightfold Path.