To attain any assured knowledge about the soul is one of the most difficult things in the world.

One of the most difficult things for any artist to do is create a world that looks both completely alien yet real and possible.

Making a comeback is one of the most difficult things to do with dignity.

Difficult things aren't easy, but they're worth it.

Be secret and exult, Because of all things known That is most difficult.

Once you have a felony conviction on your record, one of the most difficult things to do is to break the cycle of recidivism.