You can't jump down the stairs in one leap, however much you might wish to, and you even more surely can't jump up it, but one step and then the next and there you are, at the top or the bottom and not a bit out of breath or discomposed.

You can't jump down the stairs in one leap, however much you might wish to, and you even more surely can't jump up it, but one step and then the next and there you are, at the top or the bottom and not a bit out of breath or discomposed.