A self-righteous Psalm?

Psalm 17:1-9

1 Hear my plea of innocence, O LORD;

give heed to my cry; *

listen to my prayer, which does not come from lying lips.

2 Let my vindication come forth from your presence; *

let your eyes be fixed on justice.

3 Weigh my heart, summon me by night, *

melt me down; you will find no impurity in me.

4 I give no offense with my mouth as others do; *

I have heeded the words of your lips.

5 My footsteps hold fast to the ways of your law; *

in your paths my feet shall not stumble.

6 I call upon you, O God, for you will answer me; *

incline your ear to me and hear my words.

7 Show me your marvelous loving-kindness, *

O Savior of those who take refuge at your right hand

from those who rise up against them.

8 Keep me as the apple of your eye; *

hide me under the shadow of your wings,

9 From the wicked who assault me, *

from my deadly enemies who surround me.