Charles H. Spurgeon on Psalms 110:3

In the day of thy power. This refers in a general way to the gospel dispensation, and in particular to the period of conversion. To the perishing sinner the gospel comes, "not in word only, but also in power, and in the Holy Ghost, and in much assurance." It is an arresting power; it meets the sinner, and stays his mad career, as in the case of Saul of Tarsus. It is a convincing power, it teaches the sinner that he is ruined in every respect, and leads him to cry out, "What shall I do to be saved?" ... It is a life giving power; it quickens dead souls, and will eventually bring the dead bodies from their graves; "all that are in the graves shall hear the voice of the Son of God and shall live." This is the style of Jehovah, "it will, they shall"; none other dare speak thus. It is also liberating power; "if the Son shall make you free, ye shall be free indeed." —Theophilus Jones, in a Sermon preached at Surrey Chapel, 1823.