Just as worshipper of brave (in Sikand Puran 52 Bir's Nandi, Bhirangi, Hanuman, Bhairav, etc. are mentioned) asks for sweet, distributes to all but does not eat any himself.
Just as a tree bears sweet fruits but does not eat them itself. Instead birds, travellers pluck and eat them.
Just as ocean is full of all sorts of precious pearls and stones but those who have swan like temperament dives in it and relish them.
Similarly, there are many saints and hermits (who have no self interest and are always ready to do good to others without any gain to themselves) their lives become successful helping others.