Psalm 139 (My personal favorite)

O LORD, you have searched me and you know me.
You know when I sit and when I rise;
you perceive my thoughts from afar.
You discern my going out and my lying down;
you are familiar with all my ways.
Before a word is on my tongue
you know it completely, O LORD...

Where can I go from your Spirit?
Where can I flee from your presence?
If I go up to the heavens, you are there;
if I make my bed in the depths, you are there.
If I rise on the wings of the dawn,
if I settle on the far side of the sea,
even there your hand will guide me,
your right hand will hold me fast...

For you created my inmost being;
you knit me together in my mother's womb.
I praise you because I am fearfully
and wonderfully made;
your works are wonderful,
I know that full well.
My frame was not hidden from you
when I was made in the secret place.
When I was woven together
in the depths of the earth,
your eyes saw my unformed body.
All the days ordained for me
were written in your book
before one of them came to be...

Search me, O God, and know my heart;
test me and know my anxious thoughts.
See if there is any offensive way in me,
and lead me in the way everlasting.