Go for it now. The future is promised to no one.
Problems are not stop signs, they are guidelines.
Who seeks shall find.
Be gentle to all and stern with yourself.
It's always too early to quit.
Know or listen to those who know.
Expect problems and eat them for breakfast.
What you do today can improve all your tomorrows.
If you're going through hell, keep going.
Well done is better than well said.
Fullness of knowledge always means some understanding of the depths of our ignorance and that is always conducive to humility and reverence.