Every word of God is pure;
He is a shield to those who put their trust in Him. Proverbs 30:5

For the word of God is alive and active. Sharper than any double-edged sword, it penetrates even to dividing soul and spirit, joints and marrow; it judges the thoughts and attitudes of the heart. 

Hebrews 4:12

All Scripture is God-breathed and is useful for teaching, rebuking, correcting and training in righteousness, so that the servant of God may be thoroughly equipped for every good work. 

2 Timothy 3:16-17

How can a young person stay on the path of purity?
By living according to your word. NIV Psalm 119:9

But He said, “More than that, blessed are those who hear the word of God and keep it!” Luke 11:28