Instead of finding reasons why you can't, find reasons why you can.

The wise person knows that no answer is also an answer

We all have two lives. The second begins when we realise we only have one. 

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. 

Hard work - a two way street where you get exactly what you put in.

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

Hope might be a good breakfast, but it makes a very poor dinner

Your limitation - its only your imagination.

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

If you fail, next time fail better.

A book a day keeps the stupidity away.

It always seems impossible until it's done.

Everything that happens was once a dream.

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

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