the utmost perfection of love cannot go beyond the love of enemies, therefore as soon as the Lord has bid us love our enemies, He proceeds, "Be ye then perfect, as your Father which is in heaven is perfect." He indeed is perfect, as being omnipotent; man, as being aided by the Omnipotent.
faith is likened to a light, because by it the goings of the inner man, that is, action, are lightened, that he should not stumble according to that, "Thy word is a light to my feet." [Ps 119:105] If that then be pure and single, the whole body is [p. 247] light; but if defiled, the whole body will be dark.