It's always too early to quit.
The most effective way to do it, is to do it.
Begin to be now what you will be hereafter.
Problems are not stop signs, they are guidelines.
Go for it now. The future is promised to no one.
Expect problems and eat them for breakfast.
Know or listen to those who know.
Always desire to learn something useful.
Leap, and the net will appear.
To be a good loser is to learn how to win.
The capacity you're thinking of is imagination without it there can be no understanding, indeed no fiction.