Augustine of Hippo

Thus, many Christians do not eat meat, yet they do not superstitiously consider it unclean. And the same individuals who abstain when healthy take meat without qualm when sick, if it be required as a cure. Many do not drink wine. Nevertheless, they do not think it would defile them. In fact, they show great sympathy and good judgment in seeing that it is provided for those who tend to be listless and for all who cannot maintain bodily health without it.