It's always too early to quit.

Know or listen to those who know.

The wise does at once what the fool does at last.

To know oneself, one should assert oneself.

The most effective way to do it, is to do it.

Problems are not stop signs, they are guidelines.

Who seeks shall find.

Be thine own palace, or the world's thy jail.

By failing to prepare, you are preparing to fail.