To know oneself, one should assert oneself.
Begin to be now what you will be hereafter.
If you've got a talent, protect it.
The wise does at once what the fool does at last.
Without hard work, nothing grows but weeds.
Know or listen to those who know.
Problems are not stop signs, they are guidelines.
After a storm comes a calm.
Only the educated are free.
Always desire to learn something useful.
Beauty is the first test: there is no permanent place in the world for ugly mathematics.