Those who best know human nature will acknowledge most fully what a strength light hearted nonsense give to a hard working man

Swans sing before they die - 'twere no bad thing should certain persons die before they sing.

In the general course of human nature, A power over a man's subsistence amounts to a power over his will.

If the Martians can translate this and interpret it, it will give them an interesting view of human nature.

It's human nature to expect that the people that will respond early and faster will be the people that will more than likely be coming back. And we recognize that we haven't reached everyone but we reached enough people that we feel like the numbers are valid.

His works (taken together) are almost like a new edition of human nature.