3. "Eu passei um sermão nele pois acredito que ele esteja fazendo uma decisão errada."
3. "Levar sermão de vez em quando nem sempre é ruim."
3.1) I gave him an earful about what I thought when he told me about the decision he would take; which, to my thinking would be a wrong decision!
I gave him an earful about that decision he was about to take, which was a terrible mistake, in my opinion.
3.2) That reminded me that "sometimes we have to accept/embrace criticism as a way of improving our performance, etc." or more to the point "sometimes we are better off if we heed some advice"
Of course there are cases and cases. Unsolicited advice is not welcome, disrepectful and patronizing. But those useful and respectful of one´s boundaries (mainly when we are talking about interpersonal adult communication).