For, remember that, deepest of all, the words of my text may mean that the Incarnate Personal Love becomes the very soil in which my life is set and blossoms, on which my life is founded. 'Thou, my Life, O let me be Rooted, grafted, built in Thee.' Christ is Love, and Love is Christ. He that is rooted and grounded in love has the roots of his being, and the foundation of his life fixed and fastened in that Lord. So, dear brethren, go to Christ like those two on the road to Emmaus; and as Fra Angelico has painted them on his convent wall, put out your hands and lay them on His, and say, 'Abide with us. Abide with us!' And the answer will come:--'This is my rest for ever; here'--mystery of love!--'will I dwell, for I have desired it,' even the narrow room of your poor heart. LOVE UNKNOWABLE AND KNOWN 'That ye ... may be able to comprehend with all saints what is the breadth, and length, and depth, and height; and to know the love of Christ, which passeth knowledge.'--Eph. iii. 18, 19. This constitutes the third of the petitions in this great prayer of Paul's, each of which, as we have had occasion to see in former sermons, rises above, and is a consequence of the preceding, and leads on to, and is a cause or occasion of the subsequent one. The two former petitions have been for inward strength communicated by a Divine Spirit, in order that Christ may dwell in our hearts, and so we may be rooted and grounded in love. The result of these desires being realised in our hearts is here set forth in two clauses which are substantially equivalent in meaning. 'To comprehend' may be taken as meaning nearly the same as 'to know,' only that perhaps the former expresses an act more purely intellectual. And, as we shall see in our next sermon, 'the breadth and length and depth and height' are the unmeasurable dimensions of the love which in the second clause is described as 'passing knowledge.' I purpose to deal with these measures in a separate discourse, and, therefore, omit them from consideration now. We have, then, mainly two thoughts here, the one, that only the loving heart in which Christ dwells can know the love of Christ; and the other that even that heart can _not_ know the love of Christ. The paradox is intentional, but it is intelligible. Let me deal then, as well as I can, with these two great thoughts. I. First, we have this thought that only the loving heart can know Christ's love. Now the Bible uses that word _know_ to express two different things; one which we call mere intellectual perception; or to put it into plainer words, mere head knowledge such as a man may have about any subject of study, and the other a deep and living experience which is possession before it is knowledge, and knowledge because it is possession.