The dog that trots about finds a bone.
Problems are not stop signs, they are guidelines.
Begin to be now what you will be hereafter.
To know oneself, one should assert oneself.
I can, therefore I am.
After a storm comes a calm.
The most effective way to do it, is to do it.
Know or listen to those who know.
If you can dream it, you can do it.
It's always too early to quit.
As for everything else, so for a mathematical theory: beauty can be perceived but not explained.