By failing to prepare, you are preparing to fail.
Things do not happen. Things are made to happen.
If you're going through hell, keep going.
Expect problems and eat them for breakfast.
After a storm comes a calm.
You never know what motivates you.
Be gentle to all and stern with yourself.
If you think you can do it, you can.
If you can dream it, you can do it.
Problems are not stop signs, they are guidelines.
Crabbed and obscure definitions are of no use beyond a narrow circle of students, of whom probably every one has a pet one of his own.