Success can never happen without the journey (struggle).

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

Success is a journey, not a destination.

Don't expect to be good at maths or understand things straight away. Be patient and persistent. Rome wasn't built in a day, but they worked on it every single day. 

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

There are no bad mistakes in maths, only discoveries.

Nothing is impossible if you want it badly enough. Impossible = I'm possible.

There are no shortcuts to any place worth going.

Procrastination makes easy things hard and hard things harder.

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

The journey of a thousand miles begins with one step.

Tomorrow is worth more than yesterday but less than today.

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

The easiest person to deceive is yourself.

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