He that pays for work before it's done, has but a pennyworth for two pence.

I think opinions should be judged by their influences and effects; and if a man holds none that tend to make him less virtuous or more vicious, it may be concluded that he holds none that are dangerous, which I hope is the case with me.

Don't cry over spilled milk

I am the laziest man in the world. I invented all those things to save myself from toil.

Truth and sincerity have a certain distinguishing native lustre about them which cannot be perfectly counterfeited; they are like fire and flame, that cannot be painted.

Let the experiment be made.

He who will not be counseled cannot be helped.