Monks, a talk is wrongly addressed when, having weighed one type of person against another, it is addressed to these five [inappropriate] types of persons. A talk on faith is wrongly addressed to one devoid of faith; a talk on virtuous behavior is wrongly addressed to an immoral person; a talk on learning is wrongly addressed to one of little learning; a talk on generosity is wrongly addressed to a miser; a talk on wisdom is wrongly addressed to an unwise person.
And why is a talk on faith wrongly addressed to one devoid of faith? When a talk on faith is being given, a person devoid of faith loses his temper and becomes irritated, hostile, and stubborn; he displays anger, hatred and bitterness. For what reason? Because he does not perceive that faith in himself and rejoice in it. Therefore a talk on faith is wrongly addressed to a person devoid of faith…[etc. for each of the other wrongly addressed talks, and then the same list in reverse for properly addressed talks on each subject]. – from AN 5:157, translated by Bhikkhu Bodhi
The Buddha is making a narrow point here: don’t give the benefit of your wisdom to people who won’t appreciate it; it will only aggravate them. Most of us have had this experience. We say something that we think is obvious and find that the person listening has an opposing point of view; they might even get angry, sparking an argument. This is a matter of discernment. For every view that we hold, we have to assume that others may hold differing views; there is no truly safe topic of conversation. Even if we are praising someone we see as clearly praiseworthy, someone else will object to that characterization.
We can talk about faith, virtuous behavior, learning, generosity, or wisdom, and these are wholesome subjects for discussion, but we must consider whether we are approaching a willing companion in conversation of each of these topics.
We also have the choice of starting every conversation with a complaint, a criticism, or a report of injustice (usually to ourselves). There’s a certain temporary comfort to be found in assuming the posture of a put-upon citizen. But over days and weeks, this becomes tiresome for everyone. Once again, holding to silence may become an appealing option.
We could think of the advice given in this sutta as a corollary to cultivating wholesome companions. With whom could we discuss generosity? Ethical behavior? Learning as a positive virtue? Wise acts? These are the people we might do well to seek out.