The Fundamental Principle of Existence is Self Love.

The fundamental principle of existence is self love. The answer to the question as to what is self love is the need to love and to be loved in return. It is this need that it itself exists. We, collectively, are that need experiencing itself in its manifest form. It is therefore of utmost importance to recognize love as the first of all basic needs for it underwrites our very own existency.
~ Wald