I can, therefore I am.

Know or listen to those who know.

Quality is not an act, it is a habit.

To know oneself, one should assert oneself.

Be kind whenever possible. It is always possible.

Go for it now. The future is promised to no one.

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

The dog that trots about finds a bone.

Be gentle to all and stern with yourself.