Either you run the day or the day runs you.
Expect problems and eat them for breakfast.
If you're going through hell, keep going.
Do not weep do not wax indignant. Understand.
The dog that trots about finds a bone.
It's always too early to quit.
Things do not happen. Things are made to happen.
The wise does at once what the fool does at last.
Without hard work, nothing grows but weeds.
If you think you can do it, you can.
Beauty is the first test: there is no permanent place in the world for ugly mathematics.