Steady persistence in a course of action, a purpose, a state, etc. especially in spite of difficulties, obstacles, or discouragement.
In order to journey steadily, we must apply ourselves to doing well the stretch of road immediately before us on the first day of the journey, and not waste time wanting to do the last lap of the way while we still have to make it through the first.
St. Francis de Sales
Try and fail, but don't fail to try.