One touch of nature makes the whole world kin.

As individuals express their life, so they are. What they are, therefore, coincides with their production, both with what they produce and with how they produce. The nature of individuals thus depends on the material conditions determining their production.

When you're famous you kind of run into human nature in a raw kind of way. It stirs up envy, fame does.

The scientific nature of the ordinary man is to go out and do the best you can.

The inclination to exchange thoughts with one another is probably an original impulse of our nature.

It's human nature to gripe, but I'm going ahead and doing the best I can.