Optimism hopes for the best without any guarantee of its arriving and is often no more than whistling in the dark. Christian hope, by contrast, is faith looking ahead to the fulfillment of the promises of God, as when the Anglican burial service inters the corpse 'in sure and certain hope of the Resurrection to eternal life, through our Lord Jesus Christ.' Optimism is a wish without warrant; Christian hope is a certainty, guaranteed by God himself. Optimism reflects ignorance as to whether good things will ever actually come. Christian hope expresses knowledge that every day of his life, and every moment beyond it, the believer can say with truth, on the basis of God's own commitment, that the best is yet to come.
The healthy Christian is not necessarily the extrovert, ebullient Christian, but the Christian who has a sense of God's presence stamped deep on his soul, who trembles at God's word, who lets it dwell in him richly by constant meditation upon it, and who tests and reforms his life daily in response to it.
Nor is it the spirit of those Christians - alas, they are many - whose ambition in life seems limited to building a nice middle-class Christian home, and making nice middle-class Christian friends, and bringing up their children in nice middle-class Christian ways, and who leave the sub-middle-class sections of the community, Christian and non-Christian, to get on by themselves. The Christmas spirit does not shine out in the Christian snob. For the Christmas spirit is the spirit of those who, like their Master, live their whole lives on the principle of making themselves poor - spending and being spent - to enrich their fellowmen, giving time, trouble, care and concern to do good to others - and not just their own friends - in whatever way there seems need.
Knowing about God is crucially important for the living of our lives. As it would be cruel to an Amazonian tribesmen to fly him to London, put him down without explanation in Trafalgar Square and leave him, as one who knew nothing of English or England, to fend for himself, so we are cruel to ourselves if we try to live in this world without knowing about the God whose world it is and who runs it .The world becomes a strange, mad, painful place, and life in it a disappointing and unpleasant business, for those who do not know about God. Disregard the study of God, and you sentence yourself to stumble and blunder through life blindfold, as it were , with no sense of direction, and no understanding of what surrounds you. This way you can waste your life and lose your soul.