Without hard work, nothing grows but weeds.
Be gentle to all and stern with yourself.
Wherever you are - be all there.
By failing to prepare, you are preparing to fail.
Only the educated are free.
Always desire to learn something useful.
If you can dream it, you can do it.
You never know what motivates you.
The wise does at once what the fool does at last.
To be a good loser is to learn how to win.
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.