Ellipsis of where there is a will there is a way.

If someone wants or wills something strongly enough, a way can be found to make it happen.

You learn something new every day.

With limited tools, single-minded people apply them inappropriately or indiscriminately.

(dated) Being hungry makes one less concerned about the taste of one's food.

(colloquial, often humorous, rhetorical question) Used as a response to a question such as "How long will it take?" or "How big is it?" when the length or size is unknown, infinite, variable, or relative.

Humans prey upon one another.

A maxim for thrift that says that money not spent may be spent later, or may earn interest in the meantime.

One can never be sure of one's paternity.

An expression of willingness, even eagerness, to give one's life for a cause. / An expression indicating that one should not live with any regrets, or tasks left undone.