Hope is one of the Theological virtues. This means that a continual looking forward to the eternal world is not (as some modern people think) a form of escapism or wishful thinking, but one of the things a Christian is meant to do. It does not mean that we are to leave the present world as it is. If you read history you will find that the Christians who did most for the present world were just those who thought most of the next.
C. S. LewisTemperance referred not abstaining, but going the right length and no further...of course it may be the duty of a particular Christian, or any Christian, at a particular time, to abstain from strong drink, either because he is the sort of man who cannot drink at all without drinking too much, or because he wants to give the money to the poor, or because he is with people who are inclined to drunkenness and must not encourage them by drinking himself. But the whole point he is abstaining, for a good reason, from something he does not condemn and which he likes to see other people enjoying.
C. S. LewisWhen He [God] talks of their losing their selves, He means only abandoning the clamour of self-will; once they have done that, He really gives them back all their personality, and boasts (I am afraid, sincerely) that when they are wholly His they will be more themselves than ever.
C. S. LewisMany a man, brought up in the glib profession of some shallow form of Christianity, who comes through reading Astronomy to realize for the first time how majestically indifferent most reality is to man, and who perhaps abandons his religion on that account, may at that moment be having his first genuinely religious experience.
C. S. Lewis