The knowledge which was Paul's life's aim was knowledge of a Person: the object determines the nature of the knowledge. The mental act of knowing a proposition or a science or even of knowing about a person by hearing of him is different from that of knowing people when we have lived beside them. We need not be afraid of attaching too familiar a meaning to this word of our text, if we say that it implies personal acquaintance with the Christ whom we know. Of course we come to know Him in the first instance through the medium of statements about Him, and we cannot too strongly insist, in these days of destructive criticism, on the absolute necessity of accepting the Gospel statements as to the life of Jesus as the only possible method of knowing Him. But then, beyond that acceptance of the record must come the application and appropriation of it, and the transmutation of a historical fact into a personal experience. We may take an illustration from any of the Scriptural truths about Jesus:--For instance, Scripture declares Him to be our Redeemer. One man believes Him to be so, welcomes Him into his life as such, and finds Him to be such. Another man believes Him to be so, but never puts His redeeming power to the proof. Is the knowledge of these two rightly called by the same name? That which comes after experience is surely not rightly designated by the same title as that which has no vivification nor verification of such a sort to build on, and is the mere product of the understanding. There is nothing which the great mass of so-called Christians need more than to have forced into their thoughts the difference between these two kinds of knowledge of Christ. There are thousands of them who, if asked, are ready to profess that they know Jesus, but to whom He has never been anything more than a partially understood article of an uncared for creed, and has never been in living contact with their needs, nor known for their strength in weakness, their comforter in sorrow, 'their life in death,' their all in all. To deepen that experimental knowledge of Jesus is a worthy aim for the whole life, and is a process that may go on indefinitely through it all. To know Him more and more is to have more of heaven in us. To be penetrating ever deeper into His fulness, and finding every day new depths to penetrate is to have a fountain of freshness in our dusty days that will never fail or run dry. There is only one inexhaustible person, and that is Jesus Christ. We have all fulness in our Lord: we have already received all when we received Him. Are we advancing in the experience that is the parent of knowing Him? Do new discoveries meet us every day as if we were explorers in a virgin land? To have this for our aim is enough for satisfaction, for blessedness, and for growth. To know Him is a liberal education. II. That knowledge involves knowing the power of His Resurrection.