417. Now as love corresponds to the heart, and the understanding to the lungs, the foregoing statements may be corroborated by their correspondence; as, for instance, how the understanding can be elevated above its own love even into wisdom; and how, if that love is merely natural, the understanding is drawn down by it from that elevation. Man has a twofold respiration; one of the body, the other of the spirit. These two respirations may be separated and they may be conjoined; with men merely natural, especially with hypocrites, they are separated, but rarely with men who are spiritual and sincere. Consequently a merely natural man and hypocrite, whose understanding has been elevated, and in whose memory therefore various things of wisdom remain, can talk wisely in company by thought from the memory; but when not in company, he does not think from the memory, but from his spirit, thus from his love. He also respires in like manner, inasmuch as thought and respiration act correspondently. That the structure of the lungs is such that they can respire both by blood from the heart and by blood from outside of the heart has been shown above. 418. It is the common opinion that wisdom makes the man; therefore when any one is heard to talk and teach wisely he is believed to be wise; yea, he himself believes it at the time, because when he talks or teaches in company he thinks from the memory, and if he is a merely natural man, from the surface of his love, which is a desire for honor, glory, and gain; but when the same man is alone he thinks from the more inward love of his spirit, and then not wisely, but sometimes insanely. From all this it can be seen that no one is to be judged of by wise speaking, but by his life; that is, not by wise speaking separate from life, but by wise speaking conjoined to life. By life is meant love. That love is the life has been shown above.