It takes selfishness to stop someone from killing themself.

It takes selfishness to do something intentionally.

Females and boys are the only creatures that propose others for friendship. As for the rest of us, friendship sort of just happens.

Some self-employed people work for others.

Some of our friends are our friends only because we used to be friends.

In some rare cases, a friendship between two people benefits both of them, and what’s more, in some rarer cases, it benefits both of them equally.

Man is an extremely complex creature: he usually acts in an unselfish manner for selfish reasons.

Greed is a contagious mental illness without which civilization as we know it would not have been possible.

A deed is at bottom an attempt to grab or hold on to pleasure, or to make pain miss or let go of the doer.