While more of a Praise & Worship song than a hymn perhaps, the following song, written in 2003 by Casting Crowns, is a beautiful reflection on Psalm 8:3-4-

When I look at your heavens, the work of your fingers,
the moon and the stars, which you have set in place,
what is man that you are mindful of him,
and the son of man that you care for him?

Who Am I

Who am I, that the Lord of all the earth
Would care to know my name,
Would care to feel my hurt?

Who am I, that the Bright and Morning Star
Would choose to light the way
For my ever wandering heart?

Not because of who I am
But because of what You’ve done.
Not because of what I’ve done
But because of who You are.

CHORUS:
I am a flower quickly fading,
Here today and gone tomorrow.
A wave tossed in the ocean.
A vapor in the wind.

Still You hear me when I’m calling.
Lord, You catch me when I’m falling.
And You’ve told me who I am.
I am Yours, I am Yours.

Who am I, that the eyes that see my sin
Would look on me with love and watch me rise again?

Who am I, that the voice that calmed the sea
Would call out through the rain
And calm the storm in me?

Not because of who I am
But because of what You’ve done.
Not because of what I’ve done
But because of who You are.

CHORUS

Whom shall I fear?
Whom shall I fear?

‘Cause I am Yours, I am Yours.

Casting Crowns ~ Who Am I – Official Video + lyrics
Video by Joshtutu