Sympathy: this is a good translation of the concept Peter is explaining. We will have conflicts and disagreements, but these can be overcome if we are sympathetic, one to another. Generally, when there is a conflict, it is the result of misunderstanding, or of a deeper problem, perhaps a sin problem. We need to consider, as we deal with one another, that the other is dealing with matters and stresses we know nothing about, so we need to be sympathetic. We are all prone to sin.