Next, go a step higher. Look at how this law works in regard to powers of body. That is a threadbare old illustration. The blacksmith's arm we have all heard about; the sailor's eye, the pianist's wrist, the juggler's fingers, the surgeon's deft hand--all these come by use. 'To him that hath shall be given.' And the same man who has cultivated one set of organs to an almost miraculous fineness or delicacy or strength will, by the operation of the other half of the same principle, have all but atrophied another set. So with the blacksmith's arm, which has grown muscular at the expense of his legs. Part of the physical frame has monopolised what might have been distributed throughout the whole. Use is strength; use makes growth. We have what we employ. And even in regard to our bodily frame the organs that we do not use we carry about with us rather as a weight attached to us than as a possession.
Again, come a little higher. This great principle largely goes to determine our position in the world and our work. The man that can do a thing gets it to do. In the long run the tools come to the hand that can use them. So here is one medical man's consulting-room crammed full of patients, and his neighbour next door has scarcely one. The whole world runs to read A's, B's, or C's books. The briefless barrister complains that there is no middle course between having nothing to do and being overwhelmed with briefs. 'To him that hath shall be given'--the man can do a thing, and he gets it to do--'and from him that hath not shall be taken away even that which he hath,' That law largely settles every man's place in the world.
Let us come still higher. The same law has much--not all, but much--to do in making men's characters. For it operates in its most intense fashion, and with results most blessed or most disastrous, in the inner life. The great example that I would adduce is conscience. Use it, obey it, listen for its voice, never thwart it, and it grows and grows and grows, and becomes more and more sensitive, more and more educated, more and more sovereign in its decisions. Neglect it, still more, go in its teeth, and it dwindles and dwindles and dwindles; and I suppose it is possible--though one would fain hope that it is a very exceptional case--for a man, by long-continued indifference to the voice within that says 'Thou shalt' or 'Thou shalt not,' to come at last to never hearing it at all, or to its never speaking at all. It is 'seared as with a hot iron,' says one of the Apostles; and in seared flesh there is no feeling any more. Are any of you, dear friends, bringing about such a state? Are you doing what you know you ought not to do? Then you will be less and less troubled as the days go on; and, by neglecting the voice, you will come at last to be like the profligate woman in the book of Proverbs, who, after her sin, 'wipes her mouth and says, I have done no harm.' Do you think _that_ is a desirable state--to put out the eyes of your soul, to stifle what is the truest echo of God's voice that you will ever hear? Do you not think that it would be wiser to get the blessed half of this law on your side, instead of the dreadful one? Listen to that voice. Never, as you value yourselves, neglect it. Cultivate the habit of waiting for its monitions, its counsels prohibitory or commendatory, and then you will have done much to secure that your spirit shall be enriched by the operations of this wide-spread law.
Take another illustration. People who, by circumstances, are placed in some position of dependence and subordination, where they have seldom to exercise the initiative of choice, but just to do what they are bid, by degrees all but lose the power of making up their minds about anything. And so a slave set free is proverbially a helpless creature, like a bit of driftwood; and children who have been too long kept in a position of pupilage and subordination, when they are sent into the world are apt to turn out very feeble men, for want of a good, strong backbone of will in them. So, many a woman that has been accustomed to leave everything in her husband's hands, when the clods fall on his coffin finds herself utterly helpless and bewildered, just because in the long, happy years she never found it necessary to exercise her own judgment or her own will about practical matters.