Be gentle to all and stern with yourself.
By failing to prepare, you are preparing to fail.
Never complain and never explain.
If you're going through hell, keep going.
Things do not happen. Things are made to happen.
The wise does at once what the fool does at last.
If you think you can do it, you can.
Leap, and the net will appear.
Either you run the day or the day runs you.
Begin to be now what you will be hereafter.
He who devotes sixteen hours a day to hard study may become at sixty as wise as he thought himself at twenty.