It is, therefore, one of the grand services of communication to bring us to the limits of communication, making us feel, that, ere it can go farther, there must occur in us new stretches of thought, new energies of hope, faith, and all noble imagining. It were well, therefore, that, among other things, we should sometimes thank God for our ignorance and weakness,--thank Him for what we do _not_ understand and are not equal to; for with every fresh recognition of these, with every fresh approach to the borders of our intelligence, we are prepared for new requisitions upon the soul. As in a pump the air is exhausted in order that the water may rise, so a void in our intelligence _caused by its own energy_ precedes every enrichment. Hence he who will not admit to his heart the sense of ignorance will always be a fool; he who is perpetually filled with self-sufficiency will never be filled with much else. And from this point of view one may discern the significance of that doctrine of humility which belongs equally to Socratic thinking and Christian believing. It follows, too, that we need not laboriously push and foist upon the young our faith and experience. Aside from direct vital influence, which is a powerful propagandist, our simple, natural, inevitable speech will cause them to do much better than learn from us, it will cause them to learn from their own souls. And however uncertain may be a harvest from questions asked of others, a great question rightly put to one's self not only must be fruitful, but carries in it a capacity for infinite fruitfulness; while the longer and more patiently and persistently one can wait for an answer, the richer his future is to be. I am sure of him who can put to his heart the great questions of life, and wait serenely and vigilantly for a response, one, two, ten years, a lifetime, wellnigh an eternity, if need be, not falling into despondencies and despairing skepticisms because the universe forbears to babble and tattle its secret ere yet he half or a thousandth part guesses how deep and holy that secret is, but quietly, heroically asking and waiting. And toward this posture of asking the profound and vital words assist us by being heard,--which is their first eminent use to us.