This passage is allowed by all to be corrupt. If we were to punctuate differently, to insert “nisi” before “consummata,” and change “longe est” into “non deesset,” we get the following sense: “Therefore we should always meditate, brethren, on chastity, as circumstances teach us, that it may be more easy for us. It depends on no arts; for what is it but perfected will, which, if it were not checked, would certainly not fail to arise? And it is our own will, too: therefore it has not to be acquired, but we have to cherish what is already our own.”