Tomorrow is worth more than yesterday but less than today.

Success can never happen without the journey (struggle).

No matter how bad it gets, you’re still way ahead of those who haven’t even started.

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

Yesterday is history, tomorrow is a mystery, but today is a gift—that's why it's called 'the present

The wise person knows that no answer is also an answer

If you can understand just one thing thoroughly, then you will understand everything.

Start, struggle, fail, fix and learn. Repeat.

Mistakes have the power to turn you into something better than you were before.

It always seems impossible until it's done.

Work ethic is important, because, unlike intelligence, athleticism, or charisma, or any natural attribute, it’s a choice.

99% of failures come from people who have the habit of making excuses.

Tough times never last, but tough people do.

There are no bad mistakes in maths, only discoveries.

Good mathematics is not about how many answers you know... It is about how you behave when you don't know.