It's always too early to quit.

To know oneself, one should assert oneself.

Know or listen to those who know.

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

Wherever you are - be all there.

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

Be gentle to all and stern with yourself.

Well done is better than well said.

Do not weep do not wax indignant. Understand.