What is it to love?

It is to be all made of sighs and tears;

It is to be all made of faith and service;
It is to be all made of fantasy,
All made of passion and all made of wishes,
All adoration, duty, and observance,
All humbleness, all patience and impatience,
All purity, all trial, all observance;

If this be so, why blame you me to love you?

William Shakespeare - "As You Like It"