Psalm 119:9 in the World English Bible
How can a young man keep his way pure? By living according to your word.
Context
8 I will keep thy statutes: O forsake me not utterly.
9 Wherewithal shall a young man cleanse his way? by taking heed thereto according to thy word.
10 With my whole heart have I sought thee: O let me not wander from thy commandments.