Three Poisons / Three Evil Roots
In Flower Adornment Sutra, it says that
For all bad Karma created in the past, Based upon beginningless greed, hatred and delusion, And born of body, mouth and mind, I now repent and reform.
It is the well known Repentance Verse in Buddhism. In Buddhism, the distinction between what is good and what is bad is simple. It hinges on the intention or motivation from which an action originates. The deed which is associated with greed/attachment, hatred/ill will, delusion/stupidity is evil.
Greed, hatred and delusion are called the Three Poisons or Three Evil Roots, which are the primary source of all evil deed. It is the Three Poisons that create all bad Karma, resulting all kinds of suffering in accordance with the Principle of Cause and Effect. The Three Poisons are also obstacles to the attainment of good Karma. Thus we have to abandon them by all means.
