If you think you can do it, you can.
Without hard work, nothing grows but weeds.
It's always too early to quit.
Either you run the day or the day runs you.
The dog that trots about finds a bone.
Know or listen to those who know.
Things do not happen. Things are made to happen.
To know oneself, one should assert oneself.
Be kind whenever possible. It is always possible.
By failing to prepare, you are preparing to fail.
Success breeds success, and failure leads to a sort of fallow period.