348. It is plain from what has been said above that there are three things which form faith in the case of a person: the first is to approach the Lord, the second is to learn truths from the Word, the third is to live by them. Since these three stages are distinct one from the other, it follows that they can be separated. One can approach the Lord without knowing any but historical truths about God and the Lord. One can also know large numbers of truths from the Word without living by them. But the person who has these three stages separated, that is to say, one without the other, has no saving faith. This sort of faith comes about when the three are linked together, and indeed the nature of the faith depends upon the degree to which they are linked.
Where the three are separated, there faith is like infertile seed, which when put in the ground dissolves into dust; but where the three are linked, there faith is like seed in the ground which grows up into a tree, and the fruit of that faith is dependent upon their being linked. Where the three are separated, faith is like an egg lacking any fertility; but where they are linked, faith is like the fertile egg of a beautiful bird.
[2] In the case of those with whom the three are separated, faith can be likened to the eye of a cooked fish or crab; but faith with those who have them linked together can be likened to an eye which is rendered pellucid by the crystalline humour right up to and through the uvea of the pupil. Faith separated is like a painting made with colours of dark tones on a black stone, but faith linked is like a painting done with beautiful colours on a pellucid crystal. The light of separated faith can be compared with that of a fire-brand in the hand of a traveller at night, but the light of linked faith can be compared with the light of a torch, which when shaken lights up the details of the path. Faith without truths is like a vine which bears wild grapes; but faith derived from truths is like a vine which bears clusters of grapes yielding a fine wine. Faith in the Lord devoid of, truths can be compared with a new star appearing in the sky, which grows dim in time, but faith in the Lord accompanied by truths can be compared with a fixed star, which lasts permanently. Truth is the essence of faith, and therefore the nature of truth determines the nature of faith; without truths it is errant, with them it is stable. Faith based on truths also shines in heaven like a star.