The marriage bed should be undefiled, as the Apostle tells us, (1) i.e. pure, as it was when it was first instituted in the earthly Paradise, wherein no unruly desires or impure thought might enter.
All that is merely earthly must be treated as means to fulfil the end God sets before His creatures. Thus we eat in order to preserve life, moderately, voluntarily, and without seeking an undue, unworthy satisfaction therefrom. “The time is short,” says S. Paul; “it remaineth that both they that have wives be as though they had not, and they that use this world, as not abusing it.” (2)
Let every one, then, use this world according to his vocation, but so as not to entangle himself with its love, that he may be as free and ready to serve God as though he used it not. S. Augustine says that it is the great fault of men to want to enjoy things which they are only meant to use, and to use those which they are only meant to enjoy. We ought to enjoy spiritual things, and only use those which are material; but when we turn the use of these latter into enjoyment, the reasonable soul becomes degraded to a mere brutish level