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. 

Fall down seven times, stand up eight.

Dreams don't work unless you do.

The bad news is time flies, the good new is that you're the pilot.

Success is a journey, not a destination.

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

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

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

You can have results or excuses, not both

Skills are built not born.

Do Not Be Afraid To Make Mistakes. Each mistake teaches us something.

FAIL - First Attempt In Learning

You can pick up a mistake and carry it as a burden,  or you can set it down as use it as a stepping stone to greatness.

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

The boxer is not afraid of being knocked down, he is afraid of not being able to get up again.