Charlie Munger at the Daily Journal Meeting 2019:

The minute you point out there’s a big tension between good ideas yet overdone so much they’re dangerous, and good ideas that still have a lot of runway ahead. Once you have that construct in your head and start classifying opportunities into one category or the other, you’ve got the problem half solved. You don’t need me. You’ve already figured it out. You’ve gotta be aware of both potentialities and the tensions.