It's always too early to quit.
Problems are not stop signs, they are guidelines.
To know oneself, one should assert oneself.
Be thine own palace, or the world's thy jail.
To be a good loser is to learn how to win.
Only the educated are free.
Leap, and the net will appear.
Know or listen to those who know.
I can, therefore I am.
Things do not happen. Things are made to happen.
Refusal to believe until proof is given is a rational position denial of all outside of our own limited experience is absurd.
No philosophy, no religion, has ever brought so glad a message to the world as this good news of Atheism.