from Marginal Revolution; Link Here:

It also suggests that today we might have some very important ideas amongst us, we simply cannot yet see how fruitful they will be.  Their own proponents may not even know it.

The context of this is that a lot of the foundation of modern economics have already been theorized by thinkers much earlier than when they were widely considered useful information; Widely considered useful were what some people thought of these theories and thus a necessary cohesion and further study weren’t done. The ideas were not thought of to be of any positive use. Talk about a parallelism with esoteric subjects of Math that suddenly turned out useful. I think what this should tell us is that we must set aside a part of our time for our curiosities.

We never know if our ideas are useful or true,  Why not give ourselves the benefit of the doubt.