Each day is an opportunity to improve. Aim to be that little bit better than yesterday and better tomorrow than today.

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

FAIL - First Attempt In Learning

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

Don't put off until tomorrow what you can do today. If today you have no time, it means tomorrow you'll be too tired and the next day you'll be something else.

Success is a journey, not a destination.

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

It is never too late to turn an unproductive day into a productive one.

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

Success is the sum of small repeated efforts, day in and day out.

The journey of a thousand miles begins with one step. 

I had no time is no excuse. 1 hour is 4% of your day and 1 minute is 0.34 % of your day.

Be strong enough to stand alone, smart enough to know when you need help, and brave enough to ask for it.

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

Don't be afraid to take an unfamiliar path.  Sometimes they're the ones that lead you to the best places.