To know oneself, one should assert oneself.

It's always too early to quit.

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

Know or listen to those who know.

Be gentle to all and stern with yourself.

By failing to prepare, you are preparing to fail.

Do not weep do not wax indignant. Understand.

Problems are not stop signs, they are guidelines.

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