Be gentle to all and stern with yourself.
By failing to prepare, you are preparing to fail.
Without hard work, nothing grows but weeds.
Expect problems and eat them for breakfast.
To know oneself, one should assert oneself.
The secret of getting ahead is getting started.
Begin to be now what you will be hereafter.
Be thine own palace, or the world's thy jail.
If you're going through hell, keep going.
Never complain and never explain.
Imagination is as vital to any advance in science as learning and precision are essential for starting points.