J. I. Packer:
What matters supremely, therefore, is not, in the last analysis, the fact that I know God, but the larger fact which underlies it—the fact that he knows me. I am graven on the palms of his hands [Isa. 49:16]. I am never out of his mind. All my knowledge of him depends on his sustained initiative in knowing me. I know him because he first knew me, and continues to know me. He knows me as a friend, one who loves me; and there is no moment when his eye is off me, or his attention distracted from me, and no moment, therefore, when his care falters.
This is momentous knowledge. There is unspeakable comfort—the sort of comfort that energizes, be it said, not enervates—in knowing that God is constantly taking knowledge of me in love and watching over me for my good. There is tremendous relief in knowing that his love to me is utterly realistic, based at every point on prior knowledge of the worst about me, so that no discovery now can disillusion him about me, in the way I am so often disillusioned about myself, and quench his determination to bless me.
—Knowing God (Downers Grove, IL: InterVarsity Press, 1993), 41-42, emphasis added.
(HT: Justin Taylor)
Already Not Yet 
Some of your readers might like those words in this form:
Knowing That God Knows Me
What matters supremely,
Therefore, is not, in the last analysis,
The fact that I know God,
But the larger fact which underlies it—
The fact that he knows me.
I am graven on the palms of his hands .
I am never out of his mind.
All my knowledge of him depends
On his sustained initiative in knowing me.
I know him because he first knew me,
And continues to know me.
He knows me as a friend,
One who loves me;
And there is no moment
When his eye is off me,
Or his attention distracted from me,
And no moment, therefore,
When his care falters.
This is momentous knowledge.
There is unspeakable comfort—
The sort of comfort that energizes,
Be it said, not enervates—
In knowing that God is constantly
Taking knowledge of me in love
And watching over me for my good.
There is tremendous relief
In knowing that his love to me
Is utterly realistic,
Based at every point on prior knowledge
Of the worst about me,
So that no discovery now
Can disillusion him about me,
In the way I am so often disillusioned
About myself, and quench
His determination to bless me.