Diligence (noun) constant and earnest effort to accomplish what is undertaken; persistent exertion of body or mind. 
“Patience and Diligence, like faith, remove mountains.”
~William Penn
What we hope ever to do with ease, we must learn first to do with diligence.
~Samuel Johnson
“Learning is not attained by chance, it must be sought for with ardor and diligence.”
Abigail Adams
