Graham Greene said this quote

If only it were possible to love without injury – fidelity isn’t enough: I had been faithful to Anne and yet I had injured her. The hurt is in the act of possession: we are too small in mind and body to possess another person without pride or to be possessed without humiliation. In a way I was glad that my wife had struck out at me again – I had forgotten her pain for too long, and this was the only kind of recompense I could give her. Unfortunately the innocent are always involved in any conflict. Always, everywhere, there is some voice crying from a tower.