The 30th US President, Calvin Coolidge once said :-
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.