Someone has said, "If Christ is not Lord of all, He is not Lord at all." To Paul, to put it in his words, Christ was his "All in all." He knew that if his precious Lord was not the whole of his life, even the green pastures soon withered away. If Jesus was not the portion of his cup, it might as well be poison; death was preferable to living a life without Christ being the center.
Paul's eye was always fixed on Christ. He was on his mind night and day. So much so that people thought him, "beside himself" (crazy). The once blasphemer had been taken captive by His love. He knew he could take no other course but to love Him back, with all his heart, soul, mind, and strength. There are degrees of love, little and much, but he knew his Master longed for the latter. He found the more you love Him, the more you want to love him!
Paul didn't spend his time at "broken cisterns, that cannot hold water," he went directly to the fountainhead. Only there and there alone could he find satisfaction. Peter, speaking of us coming to Christ, said, "To whom coming...[is] precious." The history of Paul's life, once he met Christ, was a constant coming to Him. He knew of no other place to go! And once more, he didn't desire to go anyplace else.
O, beloved, the greatest hinderance to fuller blessings in our lives is that thing, or things, we take into our hearts with Christ. He is a jealous lover, He does not want to share us! He wants to be our, "ALL AND IN ALL."