I do not think that I will ...

I do not think that I will ever reach a stage when I will say, \
I do not think that I will ever reach a stage when I will say, "This is what I believe. Finished." What I believe is alive ... and open to growth
 Madeleine L'Engle

More phrases

Effort only fully releases its reward after a person refuses to quit.
Never complain and never explain.
A good plan violently executed now is better than a perfect plan executed next week.
 George S. Patton
Problems are not stop signs, they are guidelines.
 Robert Schuller
Never give up, for that is just the place and time that the tide will turn.
 Harriet Beecher Stowe