and how from childhood you have known the sacred writings (Hebrew Scriptures) which are able to give you the wisdom that leads to salvation through faith which is in Christ Jesus [surrendering your entire self to Him and having absolute confidence in His wisdom, power and goodness].
And how from your childhood you have had a knowledge of and been acquainted with the sacred Writings, which are able to instruct you and give you the understanding for salvation which comes through faith in Christ Jesus [through the leaning of the entire human personality on God in Christ Jesus in absolute trust and confidence in His power, wisdom, and goodness].
Yet you must go on steadily in all those things that you have learned and which you know are true. Remember from what sort of people your knowledge has come, and how from early childhood your mind has been familiar with the holy scriptures, which can open the mind to the salvation which comes through believing in Christ Jesus. All scripture is inspired by God and is useful for teaching the faith and correcting error, for re-setting the direction of a man’s life and training him in good living. The scriptures are the comprehensive equipment of the man of God and fit him fully for all branches of his work.
But don’t let it faze you. Stick with what you learned and believed, sure of the integrity of your teachers—why, you took in the sacred Scriptures with your mother’s milk! There’s nothing like the written Word of God for showing you the way to salvation through faith in Christ Jesus. Every part of Scripture is God-breathed and useful one way or another—showing us truth, exposing our rebellion, correcting our mistakes, training us to live God’s way. Through the Word we are put together and shaped up for the tasks God has for us.
for thou hast known holy letters from thy youth, which be able to learn thee to health [and for thou hast known holy letters from thy youth, or childhood, the which may inform thee to health], by faith that is in Christ Jesus.