A brother offended is harder to be won than a strong city.
Physical power and moral power
In the early life of men and communities, the power most admired is physical power. Those who can conquer in the material world are the heroes of the young. Later, men think more of intellectual achievements. The greatest in the schools is the greatest in the world. In the maturest stage of life we are content with less conspicuous feats; for we see that the less may be greater. We deem it greater to conquer in the realm of moral life than in the field of nature or the area of intellect. The conqueror in the field of battle may be great, but the conqueror of the hearts of men is greater. A brother offended may be harder to win than the bars of a castle, but so much the nobler is the victory. To win men is a nobler achievement than the defeat of men’s bodies or the confounding of their minds. (Bp. Boyd Carpenter.)
Discords among brethren
No discords are like those of brethren; the nearer the union, the greater the separation upon a breach; for natural ties being stronger than artificial, when they are once broken, they are hardly made up again, as seams when they are ripped may be sown again; but rents in the whole cloth are not so easily remedied. (H. G. Salter.)