Buddhists believe suffering is caused by what are known as the three poisons. The Bhavachakra, or the wheel of life, is a visual portrayal of the Buddhist view of the universe. It depicts these three poisons as a pig, a cock and a snake. The pig represents ignorance, the cock represents craving and the snake represents anger. You don't have to be a Buddhist to see clearly the correlation between the three poisons and suffering. Each of our lives would be made better if we sought to replace ignorance with wisdom, craving with gratitude and anger with forgiveness.