It's always too early to quit.
Always desire to learn something useful.
Never complain and never explain.
After a storm comes a calm.
To know oneself, one should assert oneself.
Things do not happen. Things are made to happen.
Quality is not an act, it is a habit.
Wherever you are - be all there.
I can, therefore I am.
You never know what motivates you.
The frontiers of knowledge in the various fields of our subject are expanding at such a rate that, work as hard as one can, one finds oneself further and further away from an understanding of the whole.