Then notice that there is also here another condition for this deep and blessed knowledge laid down in these words, 'That ye may be able to comprehend _with all saints_.' That is to say, our knowledge of the love of Jesus Christ depends largely on our sanctity. If we are pure we shall know. If we were wholly devoted to Him we should wholly know His love to us, and in the measure in which we are pure and holy we shall know it. This heart of ours is like a reflecting telescope, the least breath upon the mirror of which will cause all the starry sublimities that it should shadow forth to fade and become dim. The slightest moisture in the atmosphere, though it be quite imperceptible where we stand, will be dense enough to shut out the fair, shining, snowy summits that girdle the horizon and to leave nothing visible but the lowliness and commonplaceness of the prosaic plain.
If you want to know the love of Christ, first of all, that love must purify your souls. But then you must keep your souls pure, assured of this, that only the single eye is full of light, and that they who are not 'saints' grope in the dark even at midday, and whilst drenched by the sunshine of His love, are unconscious of it altogether. And so we get that miserable and mysterious tragedy of men and women walking through life, as many of you are doing, in the very blaze and focus of Christ's love, and never beholding it nor knowing anything about it.
Observe again the beginning of this path of knowledge, which we have thus traced. There must be, says my text, an indwelling Christ, and so an experience, deep and stable, of His love, and then we shall know the love which we thus experience. But how comes that indwelling? That is the question for us. The knowledge of His love is blessedness, is peace, is love, is everything; as we shall see in considering the last stage of this prayer. That knowledge arises from our fellowship with and our possession of the love of God, which is in Jesus Christ. How does that fellowship with, and possession of the love of God in Jesus Christ, come? That is the all-important question. What is the beginning of everything? 'That Christ may dwell in your hearts by faith.' There is the gate through which you and I may come, and by which we must come if we are to come at all into the possession and perception of Christ's great love. Here is the path of knowledge. First of all, there must be the simple historical knowledge of the facts of Christ's life and death for us, with the Scripture teaching of their meaning and power. And then we must turn these truths from mere notions into life. It is not enough to know the love that God has to us, in that lower sense of the word 'knowledge.' Many of you know that, who never got any blessing out of it all your days, and never will, unless you change. Besides the 'knowing' there must be the 'believing' of the love. You must translate the notion into a living fact in your experience. You must pass from the simple work of understanding the Gospel to the higher act of faith. You must not be contented with knowing, you must trust. And if you have done that all the rest will follow, and the little, narrow, low doorway of humble self-distrusting faith, through which a man creeps on his knees, leaving outside all his sin and his burden, opens out into the temple palace--the large place in which Christ's love is imparted to the soul.
Brethren, this doctrine of my text ought to be for every one of us a joy and a gospel. There is no royal road into the sweetness and the depth of Christ's love, for the wise or the prudent. The understanding is no more the organ for apprehending the love of Christ than the ear is the organ for perceiving light, or the heart the organ for learning mathematics. Blessed be God! the highest gifts are not bestowed upon the clever people, on the men of genius and the gifted ones, the cultivated and the refined, but they are open for all men; and when we say that love is the parent of knowledge, and that the condition of knowing the depths of Christ's heart is simple love which is the child of faith, we are only saying in other words what the Master embodied in His thanksgiving prayer, 'I thank Thee, Father! Lord of heaven and earth, because Thou hast hid these things from the wise and prudent, and hast revealed them unto babes.'