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. 

Success is not final, failure is not fatal.  It is the courage to continue that counts.

FAIL - First Attempt In Learning

It always seems impossible until it's done.

The master has failed more times than the beginner has even tried

Success is the sum of small repeated efforts, day in and day out.

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

Success is a journey, not a destination.

Practice makes comfort. Expand your experiences regularly so every stretch won't feel like your first.

If you want to succeed, double your failure rate.

Skills are built not born.

Shoot for the moon and even if you miss you’ll land among the stars/

He who has begun his task is half-way done. Have the courage to begin!

Success can never happen without the journey (struggle).

The gift of imperfection - let go of who you think you're supposed to be and embrace who you are.