Be gentle to all and stern with yourself.
You never know what motivates you.
The wise does at once what the fool does at last.
By failing to prepare, you are preparing to fail.
What you do today can improve all your tomorrows.
Go for it now. The future is promised to no one.
The most effective way to do it, is to do it.
After a storm comes a calm.
Expect problems and eat them for breakfast.
If you think you can do it, you can.
Science is a self-sufficient activity.
The thing about science is that it's an accurate picture of the world.