The same divine authority that forbids the killing of a human being establishes certain exceptions, as when God authorizes killing by a general law or when He gives an explicit commission to an individual for a limited time.
Saint AugustineI beseech Thee, my God, I would fain know, if so Thou willest, for what purpose my baptism was then deferred? was it for my good that the rein was laid loose, as it were, upon me, for me to sin? or was it not laid loose? If not, why does it still echo in our ears on all sides, "Let him alone, let him do as he will, for he is not yet baptised?" but as to bodily health, no one says, "Let him be worse wounded, for he is not yet healed." How much better then, had I been at once healed; and then, by my friends' diligence and my own, my soul's recovered health had been kept safe in Thy keeping who gavest it.
Saint AugustineLove is a temporary madness. It erupts like an earthquake and then subsides. And when it subsides you have to make a decision. You have to work out whether your roots have become so entwined together that it is inconceivable that you should ever part. Because this is what love is. Love is not breathlessness, it is not excitement, it is not the promulgation of promises of eternal passion. That is just being in love which any of us can convince ourselves we are. Love itself is what is left over when being in love has burned away, and this is both an art and a fortunate accident.
Saint Augustine