[2] These means advance, one kind after another, from infancy to the last of man's life, and thereafter to eternity. As they come along and mount, the earlier ones become means to the later, entering into all that is forming as mediate causes. From these every effect or conclusion is efficacious and therefore becomes a cause. In turn what is later becomes means; and as this goes on to eternity, there is nothing farthest on or final to make an end. For as what is eternal is without end, so a wisdom that increases to eternity is without end. If there were an end to wisdom for a wise man, the enjoyment of his wisdom would perish, which consists in the perpetual multiplication and fructification of wisdom. His life's enjoyment would also perish; in its place an enjoyment of glory would succeed, in which by itself there is no heavenly life. The wise man then becomes no longer like a youth but like an old man, and at length like a decrepit one. [3] Although a wise man's wisdom increases forever in heaven, angelic wisdom cannot approximate the divine wisdom so much as to touch it. It is relatively like what is said of a straight line drawn about a hyperbola, always approaching but never touching it, and like what is said about squaring a circle. Hence it may be plain what is meant by the means by which divine providence acts in order that man may be man and be perfected in understanding, and that these means are called by the common term truths. There are an equal number of means by which man is formed and perfected as to his will. These are called collectively goods. By them man comes to have love, by the others wisdom. The conjunction of love and wisdom makes the man, for what he is is in keeping with the nature of this conjunction. This conjunction is what is called the marriage of good and truth. 336. The methods by which divine providence acts on and through the means to form and perfect the human being are also infinite in number and variety. They are as numerous as the activities of divine wisdom from divine love to save man, and therefore as numerous as the activities of divine providence in accordance with its laws, treated of above. That these methods are most secret was illustrated above by the activities of the soul in the body, of which man knows so little it is scarcely anything--how, for instance, eye, ear, nose, tongue and skin sense things; how the stomach digests; how the mesentery elaborates the chyle and the liver the blood; how the pancreas and the spleen purify the blood, the kidneys separate it from impure humors, the heart collects and distributes it, and the lungs purify it and pass it on; how the brain refines the blood and vivifies it anew; besides innumerable other things which are all secret, and of which one can scarcely know. Clearly, the hidden activities of divine providence can be entered into even less; it is enough to know its laws.