If you think you can do it, you can.
Without hard work, nothing grows but weeds.
It's always too early to quit.
The dog that trots about finds a bone.
What you do today can improve all your tomorrows.
The secret of getting ahead is getting started.
Be thine own palace, or the world's thy jail.
Be kind whenever possible. It is always possible.
Who seeks shall find.
Begin to be now what you will be hereafter.
Science is a self-sufficient activity.
The thing about science is that it's an accurate picture of the world.