Sila: Virtue, good conduct, morality. This is based on two fundamental principles: The principle of equality: that all living entities are equal. The principle of reciprocity: This is the “Golden Rule” in Christianity – to do unto others as you would wish them to do unto you. It is found in all major religions.
Samadhi: Concentration, meditation, mental development. Developing one’s mind is the path to wisdom which, in turn, leads to personal freedom. Mental development also strengthens and controls our mind; this helps us maintain good conduct. 
Prajna: Discernment, insight, wisdom, enlightenment. This is the real heart of Buddhism. Wisdom will emerge if your mind is pure and calm. The first two paths listed in the Eightfold Path, described below, refer to discernment; the last three belong to concentration; the middle three are related to virtue.