6. But it is by love that we must stand firm to this and cleave to this, in order that we may enjoy the presence of that by which we are, and in the absence of which we could not be at all. For as “we walk as yet by faith, and not by sight,” we certainly do not yet see God, as the same [apostle] saith, “face to face:” whom however we shall never see, unless now already we love. But who loves what he does not know? For it is possible something may be known and not loved: but I ask whether it is possible that what is not known can be loved; since if it cannot, then no one loves God before he knows Him. And what is it to know God except to behold Him and steadfastly perceive Him with the mind? For He is not a body to be searched out by carnal eyes. But before also that we have power to behold and to perceive God, as He can be beheld and perceived, which is permitted to the pure in heart; for “blessed are the pure in heart. for they shall see God;” except He is loved by faith, it will not be possible for the heart to be cleansed, in order that it may be apt and meet to see Him. For where are there those three, in order to build up which in the mind the whole apparatus of the divine Scriptures has been raised up, namely Faith, Hope, and Charity, except in a mind believing what it does not yet see, and hoping and loving what it believes? Even He therefore who is not known, but yet is believed, can be loved. But indisputably we must take care, lest the mind believing that which it does not see, feign to itself something which is not, and hope for and love that which is false. For in that case, it will not be charity out of a pure heart, and of a good conscience, and of faith unfeigned, which is the end of the commandment, as the same apostle says.