In this article, McLeod argues that while reason points humanity toward the existence of God, it cannot provide certainty concerning salvation or eternal life. God has therefore graciously given Scripture as a divine revelation, confirmed by historical testimony, fulfilled prophecy, its moral excellence, and its transforming power. McLeod then expounds 2 Timothy 3:16, showing that Scripture is profitable for doctrine, reproof, correction, and instruction, thoroughly equipping believers to know, obey, and glorify God.