It's always too early to quit.
To know oneself, one should assert oneself.
Always desire to learn something useful.
The secret of getting ahead is getting started.
Only the educated are free.
The dog that trots about finds a bone.
Begin to be now what you will be hereafter.
Either you run the day or the day runs you.
I can, therefore I am.
To be a good loser is to learn how to win.
I'd think learning to play the guitar would be very confusing for sighted people.