If there be a faith that can move mountains, it is faith in one's own power.

The believer who has never doubted will hardly convert a doubter.

Those who know nothing must believe everything.

To be satisfied with little is hard, to be satisfied with a lot is impossible.

Origins are of the greatest importance. We are almost reconciled to having a cold when we remember where we caught it.

To be content with little is difficult; to be content with much, impossible.

Not every great man is a grand human being.