Nothing in the world is difficult for one who sets his mind to it.
Nothing is difficult to the man who will try.
Nothing is impossible to a willing heart.
Where there is a will, there is a way.
Nothing is impossible (or difficult) to the man who will try.
Nothing is impossible to willing mind (or heart).
nothing is difficult to a man who wills
All things are difficult before they are easy.
Confidence in yourself is the first step on the road to success.
Confidence of success is almost success.