It was a joy to have Daniel Whitehead (Executive Director of Sanctuary Mental Health Ministries) with us at First this past Sunday. His reflections on the first half of Psalm 139, particularly as it relates to God's knowledge of us--God
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. 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
There is, certainly, great cause for humility in the thought that he sees all the twisted things about me that my fellow humans do not see (and am I glad!), and that he sees more corrupt in me than the which I see in myself (which, in all conscience, is enough). There is, however, equally great incentive to worship and love God in the thought that, for some unfathomable reason, he wants me as his friend, and desires to be my friend, and has given his Son to die for me in order to realize this purpose. We cannot work these out here, but merely to mention them Is enough to show how much it means to know not merely that we know God, but that he knows us. 
"This, then, is how you should pray: 'Our Father...'" (Mt 6:9). As Jesus always prayed to his God as Father (Abba in Aramaic an intimate family word), so must his followers do, Jesus could say to his Father, "You always hear me" (Jn 11:42), and he wants his disciples to know that, as God's adopted children, the same is true of them. The Father is always accessible to his children and is never too preoccupied to listen to what they have to say. This is the basis of Christian prayer." 
Indeed, the Father, Abba, intimately knowing us is the basis of all of our prayers. In prayer, we come to a greater awareness of whose we are. And so, for this week, as we pray, may we marvel at who He is and in doing so come to know much more deeply whose we are. In between our petitions, let us take time to adore. To gaze with wonder. To stand in awe. To fall in worship. As Richard L. Pratt, Jr asks in his book on prayer, "When was the last time you were fascinated with God?" 
Throughout the week, we hope that this attached appendix will be helpful to you. It contains a number of the names, titles, and metaphors for God the Father, Son, and Holy Spirit within the Bible.  Whether it be at the very start of your day or as you are praying with others in your Connection Group, please do take time to pray with the list at hand.
 Jim Packer, Knowing God, pp. 45-46
 Ibid, pp. 238-239
 Richard L. Pratt, Jr, Pray With Your Eyes Open, pg. 27
 Ibid, pp. 183-190