In the human heart there is natural selfishness and corruption, which can only be overcome by most thorough discipline and severe restraint; and even then it will require years of patient effort and earnest resistance. God permits us to experience the ills of poverty, and places us in difficult positions, that the defects in our characters may be revealed and their asperities be smoothed away. But after privileges and opportunities have been given of God, after light and truth have been brought home to the understanding, if persons still make excuses for their deformity of character, and continue in their selfishness and jealousy, their hearts become as granite, making it impossible for them to be reformed, except by the chisel, the hammer, and the polishing of the Spirit of God.