9  How can a young man keep his way pure?

By guarding it according to your word.

Some versions of the Psalm ask:

How can a young man cleanse his way?

Do you recognize sin for the filth of the dust it is?

Do you need bathed in the righteousness of Christ Jesus?

I do.

10 With my whole heart I seek you;
let me not wander from your commandments!

The Prophet Jeremiah warns [17:5 ESV & 17:9 KJV]:

Thus says the LORD:
“Cursed is the man who trusts in man
and makes flesh his strength,
whose heart turns away from the LORD.

The heart is deceitful above all things, and desperately wicked: who can know it?

11 I have stored up your word in my heart,
that I might not sin against you.
12 Blessed are you, O Lord;
teach me your statutes!
13 With my lips I declare
all the rules of your mouth.
14 In the way of your testimonies I delight
as much as in all riches.
15 I will meditate on your precepts
and fix my eyes on your ways.

The King James Version translates:

15 I will meditate in thy precepts, and have respect unto thy ways.

Do you actually consider God’s ways over your own misguided ways?

Do you have so much respect for God and the Cross of Christ that you focus on the Way of our Lord Christ Jesus? He IS the Word and the Light of the Way of our Salvation.

16 I will delight in your statutes;
I will not forget your word.