Go for it now. The future is promised to no one.
If you're going through hell, keep going.
I can, therefore I am.
Without hard work, nothing grows but weeds.
It's always too early to quit.
You never know what motivates you.
Always desire to learn something useful.
The dog that trots about finds a bone.
Expect problems and eat them for breakfast.
Who seeks shall find.
I actually think with age comes some level of wisdom.