The greatest mistake we make is living in constant fear that we will make one.

Knowledge is of no value unless you put it into practice.

You cannot escape the responsibility of tomorrow by evading it today

1.00³⁶⁵=1 and 1.01³⁶⁵=37.7. Doing nothing at all versus small steps at a time. 

I have not failed, I've just found 10,000 ways that won't work.

There is no elevator to success, you have to take the stairs.

Try and do one thing each day that you would really rather not do.

Pure mathematics is in its way, the poetry of logical ideas.

Whenever you find yourself doubting how far you can go, just remember how far you have come.

The temptation to quit will be the greatest when you are about to succeed

You can pick up a mistake and carry it as a burden,  or you can set it down as use it as a stepping stone to greatness.

Twenty years from now you will be more disappointed by the things you didn’t do than the things you did do

Hard work always pays off - it is not a question of if you will get there, but WHEN you will get there

It doesn’t matter where you start, it matters how you end

No one starts out on top. You have to work your way up.