What is the most needed essential for the healthy, harmonious and useful conduct of human life? Love, Intelligence and Wisdom. I had almost said Love or Wisdom, for Intelligence and Wisdom are but manifestations of Love. Intelligence is the light of Love, and wisdom is but its reflection on its own enlightened shadow—the mind. Wisdom likewise embodies both Love and its light. Without wisdom a human being is like a wayward, mischievous animal. Our wisdom (intelligence and thought) inspire and guide our actions. Good thoughts lead us to good actions, bad thoughts lead us to bad actions. We are nothing but our mind and our mind is nothing but our thoughts—commingled effects of the reflections upon the mind of external objects and internal impressions of previous reflections of objects, called Ideas. Thoughts that lead us to bad actions, that is to say, actions which hurt others and us too, which bring inharmony to others and finally to our own mind, are neither beneficial nor useful to our life; they are injurious to its best interests. Wisdom (harmonious, useful thoughts) is therefore the most essential requisite of human life. Without it power and wealthy are apt always to be misused and misdirected, resulting in loss of harmony. And harmony is happiness, happiness which is the goal of all our quests and efforts in life. Thus the Brāhmans, who devote themselves absolutely to acquiring wisdom by communing with the Soul of Nature and its finest and purest attributes, and to supplying them to those who do not any more enjoy that advantage and privilege, naturally form the head —the seat of wisdom and intelligence—of the social organization, called the four-castes. The lower three castes are indebted to the Brāhmans for wisdom which they receive from them in the form of lessons and codified laws of life which guide their daily existence, just as every one of us is indebted to our intelligence and wisdom for performing the functions of life to our own and our neighbors' benefit. Hence the Brāhmans, who supply the most important essential of life, are protected, provided for and paid utmost homage to, by all the other castes.