What are the three poisons? Attachment, aversion, and ignorance (represented by the bird, the snake and the pig respectively). All forms of suffering can be traced back to one or more of these three. In very simplistic terms, attachment means clinging, desiring, wanting. If we are attached to something we want to hold on to it and not let go. We want to keep it for ourselves. We are sad or angry if it goes away. Aversion means we do not want something, we want it to go away, we want it removed from our presence. We are sad or angry if it remains. Ignorance means not knowing, a lack of clarity, not seeing things as they really are.
Dharma is full of antidotes for these poisons. Find a dharma-gate that works for you, and enter in. The Buddhas and Bodhisattvas stand before us all, encouraging us to become a fully awakened being, a Buddha.