16 All scripture is given by inspiration of God, and is profitable for doctrine, for reproof, for correction, for instruction in righteousness: 17 That the man of God may be perfect, thoroughly furnished unto all good works. — 2 Timothy 3:16-17
The Word of God has in it an efficacy which no other book in the world has.
It is profitable for doctrine — instructing in holy things, the things of God and eternal life.
It is profitable for reproof — convicting us of sin and declaring God’s judgment against evil.
It is profitable for correction — not only showing us our faults, but leading us away from them, freeing our lives from errors and making straight what was crooked.
It is profitable for instruction in righteousness — telling us how God would have us live, what qualities of character He would have us attain.
One who is trained under the tuition of the Scriptures will come to be a complete Christian, furnished for usefulness and prepared for doing whatever good work he may be called to do.
J.R. Miller was a pastor and former editorial superintendent of the Presbyterian Board of Publication from 1880 to 1911. His works are now in the public domain.