Problems are not stop signs, they are guidelines.
You never know what motivates you.
If you can dream it, you can do it.
Only the educated are free.
Without hard work, nothing grows but weeds.
The most effective way to do it, is to do it.
Leap, and the net will appear.
Always desire to learn something useful.
If you think you can do it, you can.
Who seeks shall find.
Beauty is the first test: there is no permanent place in the world for ugly mathematics.