Problems are not stop signs, they are guidelines.
To be a good loser is to learn how to win.
You never know what motivates you.
The wise does at once what the fool does at last.
Begin to be now what you will be hereafter.
It's always too early to quit.
Be gentle to all and stern with yourself.
The most effective way to do it, is to do it.
Be thine own palace, or the world's thy jail.
Leap, and the net will appear.
Imagination is as vital to any advance in science as learning and precision are essential for starting points.