'Bad' in the Bible

But Absalom said nothing to Amnon, either bad or good, yet Absalom hated Amnon because he had humiliated his sister Tamar.

I am presently eighty years old. Am I able to discern good and bad? Can I taste what I eat and drink? Am I still able to hear the voices of male and female singers? Why should I continue to be a burden to my lord the king?