It's always too early to quit.

Know or listen to those who know.

By failing to prepare, you are preparing to fail.

If you think you can do it, you can.

To be a good loser is to learn how to win.

To know oneself, one should assert oneself.

I can, therefore I am.

Problems are not stop signs, they are guidelines.

Begin to be now what you will be hereafter.