All things are possible until they are proved impossible—even the impossible may only be so for now.

Do not think that what is hard for you to master is humanly impossible; but if a thing is humanly possible, consider it to be within your reach.

So many of our dreams at first seem impossible. Then they seem improbable. And then, when we summon the will, they soon become inevitable.

Free will, though it makes evil possible, is also the only thing that makes possible any love or good or joy worth having.

Man is a universe in little.

The creation of a thousand forests is in one acorn.