To know oneself, one should assert oneself.

It's always too early to quit.

Know or listen to those who know.

Problems are not stop signs, they are guidelines.

Be kind whenever possible. It is always possible.

By failing to prepare, you are preparing to fail.

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

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

The dog that trots about finds a bone.