If you have a craftsman's command of the language and basic writing techniques you'll be able to write - as long as you know what you want to say.
The creative is the place where no one else has ever been. You have to leave the city of your comfort and go into the wilderness of your intuition.
A mathematician, like a painter or a poet, is a maker of patterns. If his patterns are more permanent than theirs, it is because they are made with ideas.