[2] To enable the implications of all this to be seen a brief explanation is necessary. When a person knows the truth it is not truth constituting intelligence until he is led by good; but when he is led by good it starts to become the truth of intelligence. For truth does not receive its life from itself but from good; and truth receives its life from good when the person lives in conformity with that truth. When he does this, truth injects itself into the intentions of his will, and from these into his actions, and so into the entire person. Truth that is merely known or grasped intellectually by a person remains excluded from his will, and so from his life since the intentions of a person's will constitute his life. But once he is intent on truth it stands at the gateway into his life; and when he is intent on it and therefore practices it, that truth is present within the entire person. Then, when his practice of that truth is frequent its reappearance is attributable not merely to habit but also to an affection for it and so to a free desire to practise it. Let anyone at all consider whether anything can be taken in by a person apart from that which he is intent on putting into practice. That which he merely thinks about but does not actually do, more so that which he thinks about but does not wish to do, is nothing else than something which remains excluded from that person, and is also driven away like a straw by the smallest puff of wind, and is actually blown away in that manner in the next life. From this one can know what faith without works is. These considerations now show what truth constituting intelligence is, namely truth which is rooted in good. Truth is the characteristic feature of the understanding and good that of the will; or what amounts to the same, truth is the substance of doctrine and good that of life.