Be empty. Be still. Just watch everything come and go. This is the way of Nature.
For knowledge, add something every day. For wisdom....subtract.
...the more you talk of it, the less you understand.
Heaven and Earth are not kind. They regard all things as offerings.
Knowing others is to be clever. Knowing yourself is to be enlightened. Overcoming others requires force. Overcoming yourself requires strength.
If you want to awaken all of humanity, then awaken all of yourself, if you want to eliminate the suffering in the world, then eliminate all that is negative in yourself. Truly, the greatest gift you have to give is that of your own self-transformation.