So his Holy Spirit is given to us, if we will, to make us holy. We may, if we will, have that divine guest in our inmost spirit, molding us anew, purging the fountains of our will, enlightening our blindness, fixing our love on all things pure and high, burning up all our evil, with which in our own strength we have vainly fought, and kindling in us a flame of self-forgetting love, in which, as in the central fire of the earth, all the elements of the new nature to be formed within us are molten together, ready to crystallize into beauty like precious gems, or to consolidate into strength like the granite mountains. Any man may, if he will, be “full of the Holy Ghost”—as a vessel is filled with precious elixir poured into it. Any man may, if he will, have his whole nature influenced and inhabited by that mighty spirit of whom we may all be the temples, and which dwells in us not as the image of the god abides in the shrine, but as our spirits animate our bodies, being diffused through all our nature, the eye of our seeing, the heart of our love, the will of our resolve, and in all of us the source of our goodness, and the life of our better life. “If any man have not the spirit of Christ, he is none of his.” Let us remember that this penetration of all our nature with a divine spirit dwelling within us is _the_ promise of Christianity to every man. No mere love of God the Father, even if it were brought to us in the grace of our Lord Jesus Christ would be enough without the communion of the Holy Ghost. Calvary and Olivet are not sufficient for our victory over sin without the upper room and the rushing mighty wind. And let us not forget that the spirit thus given to all Christians is the spirit of illumination indeed, the spirit of power, rich in his seven-fold energies, and the source of every endowment of mind and hand and tongue and heart that we possess, but that his highest and most universal office is to make us good, and his best name the Holy Spirit. Let us court earnestly the best gifts, but seek more earnestly still that gift which needs no special capacity to receive nor any special circumstances to exercise, but may be claimed by the poorest, and will ennoble the loftiest. Let others seek for gifts; do you pray for graces. Let who will be great, do you try to submit to the working of the good Spirit who makes you good. Our text carries the analysis a step farther, and shows us how Barnabas came to be full of the Holy Ghost. It gives us the _condition of goodness_. He was good because he was full of the spirit, and he was full of the spirit because he was full of faith. That is the final explanation of his character.