One of my favourite quotes is from Calvin Coolidge, the 30th President of the USA:

“Nothing in this world can take the place of persistence. Talent will not; nothing is more common than unsuccessful people with talent. Genius will not; unrewarded genius is almost a proverb. Education will not; the world is full of educated derelicts. Persistence and determination alone are omnipotent. The slogan ‘press on’ has solved and always will solve the problems of the human race!”

Persistence - perseverence - that's what it's all about!
Persistence – perseverence – that’s what it’s all about!