To know oneself, one should assert oneself.
You never know what motivates you.
Either you run the day or the day runs you.
By failing to prepare, you are preparing to fail.
Wherever you are - be all there.
It's always too early to quit.
Do not weep do not wax indignant. Understand.
I can, therefore I am.
If you think you can do it, you can.
The secret of getting ahead is getting started.
Science is wonderfully equipped to answer the question 'How?' but it gets terribly confused when you ask the question 'Why?'