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. 

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.

Never underestimate the importance of small steps. small steps = big changes. 

Hard work beats talent when talent doesn't work hard.

Everything you want is on the other side of fear

Success is a journey, not a destination.

It always seems impossible until it's done.

Success can never happen without the journey (struggle).

Your attitude is everything. Pick a good one.

When you make a mistake, take another chance. Only when you choose not to do so do you fail.

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

Don’t practice until you get it right, practice until you can’t get it wrong.

Lose an hour in the morning and you will spend all day looking for it.

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

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