I firmly believe that the moment our hearts are emptied of pride and selfishness and ambition and self-seeking and everything that is contrary to God’s law, the Holy [Spirit] will come and fill every corner of our hearts; but if we are full of pride and conceit and ambition and self-seeking and pleasure and the world, there is no room for the Spirit of God; and I believe many a [person] is praying to God to fill [them] when [they are] full already with something else. Before we pray that God will fill us, I believe we ought to pray that He would empty us. There must be an emptying before there can be a filling. And when the heart is turned upside-down and everything that is contrary to God is turned out, then the Spirit will come.
-- D. L. Moody, as quoted in “The End of Me” by Kyle Idleman