It is much more comfortable to be mad and know it, than to be sane and have one's doubts.

The mad were put in asylums, but the sane are worse off in their offices.

The sane are madder than we think, the mad saner.

Materialists and madmen never have doubts.

When time is running out and a goal seems to be unreachable, don't allow your hopes and aspirations to become hostage of your doubts.

In a completely sane world, madness is the only freedom.