Matthew 24:13 - Albert Barnes' Notes on the Bible

He that shall endure unto the end, the same shall be saved - The word “end,” here, has by some been thought to mean the destruction of Jerusalem, or the end of the Jewish economy, and the meaning has been supposed to be “he that perseveres in bearing these persecutions to the end of the wars shall be safe. God will protect his people from harm, so that not a hair of the head shall perish.” Others, with more probability, have referred this to final salvation, and refer the end to the close of life. “He that bears afflictions and persecutions faithfully that constantly adheres to his religion, and does not shrink until death shall be saved, or shall enter heaven.” So Luke Luke 21:18 says, “there shall not an hair of your head perish” - that is, they would be saved. “An hair of the head,” or the smallest part or portion, is a proverbial expression, denoting the “certainty and completeness” of their salvation. Luke Luke 21:19 adds further: “In your patience possess ye your souls” - that is, keep your souls “patient;” keep proper possession of patience as your own. It is a part of religion to teach it, and in these trying times let it not depart from you.