Newman cites tomorrows Gospel in a sermon entitled "The Ventures of Faith":

Such were the ventures made in faith, and in uncertainty, by Apostles. Our Saviour, in a passage of St. Luke's Gospel, binds upon us all the necessity of deliberately doing the like,"Which of you, intending to build a tower, sitteth not down first and counteth the cost, whether he have sufficient to finish it? Lest haply, after he hath laid the foundation, and is not able to finish it, all that behold it, begin to mock him, saying, This man began to build, and is not able to finish." And then He presently adds, "So likewise, whosoever he be of you that forsaketh not all that he hath, he cannot be My {299} disciple:" [Luke xiv. 28-33.] thus warning us of the full sacrifice we must make. We give up our all to Him; and He is to claim this or that, or grant us somewhat of it for a season, according to His good pleasure. On the other hand, the case of the rich young man, who went away sorrowful, when our Lord bade him give up his all and follow Him, is an instance of one who had not faith to make the venture of this world for the next, upon His word.If then faith be the essence of a Christian life, and if it be what I have now described, it follows that our duty lies in risking upon Christ's word what we have, for what we have not; and doing so in a noble, generous way, not indeed rashly or lightly, still without knowing accurately what we are doing, not knowing either what we give up, nor again what we shall gain; uncertain about our reward, uncertain about our extent of sacrifice, in all respects leaning, waiting upon Him, trusting in Him to fulfil His promise, trusting in Him to enable us to fulfil our own vows, and so in all respects proceeding without carefulness or anxiety about the future.

The "sad infirmity of men, called Christians," however, commonly do not venture much upon faith:

This is the question, What have we ventured? I really fear, when we come to examine, it will be found that there is nothing we resolve, nothing we do, nothing we do not do, nothing we avoid, nothing we choose, nothing we give up, nothing we pursue, which we should not resolve, and do, and not do, and avoid, and choose, and give up, and pursue, if Christ had not died, and heaven were not promised us. I really fear that most men called Christians, whatever they may profess, whatever they may think they feel, whatever warmth and illumination and love they may claim as their own, yet would go on almost as they do, neither much better nor much worse, if they believed Christianity to be a fable.