Them that think they remember how

In the grand scheme of things, the best mentor is the one who just did it. Or the one who believes they forgot it already.

The dangerous one is the one who thinks they remember it all. They do not, and whatever they do remember could be just wrong enough that you won't notice.

The one who believes they forgot it already has the benefit of distance and rumination.

The one who just did it has the freshest map.