Symbiotic relationships:  those in which each contributes to the welfare of another.  Do you not realize this is why you are here?  To contribute to the advancement of the whole.  Yes, you do this by improving the self, through self-improvement practices and being the presence of love.  But no man is an island.  You are your fellow man at the core.  You can place yourself in another’s shoes at any time and feel his or her pain or joy, can you not?  If you cannot, then begin there to love yourself.  When you have sufficiently developed the ability to experience love, then share it liberally with your brothers and sisters.  As it flows forth freely from you, it comes back to you.  Indeed, what goes around comes around, for it is a closed loop of love, not an open circuit where the love that flows around dissipates. 
 
It is a symbiotic world.  Add unto the whole by doing your part.  Love fully. Give freely, and thrive.