I've started reading/studying the attributes of God in preparation for our student summer camp, Glory Days.  An attribute, per the dictionary on my Macbook, is defined as "a quality or feature regarded as a characteristic or inherent part of someone or something."  Our theme this summer is on God Himself, and we plan on studying God's attributes in small group times and preaching times.  I have been and will be reading parts of Systematic Theology by Wayne Grudem, The Knowledge of the Holy by A.W. Tozer, The Attributes of God by A.W. Pink, and The One True God by Paul Washer as sources in my study.  I am currently (today) reading in Grudem's book on the incommunicable attributes of God ("those attributes that God does not share or 'communicate' to others" - Grudem).  

In reading on omnipresence (the attribute that "God does not have size or spatial dimensions and is present at every point of space with His whole being..." - Grudem), there is a great quote from Herman Bavinck's work, The Doctrine of God, in regards to omnipresence.  In light of Psalm 139:7-12, I wanted to share this paragraph with you.

"When you wish to do something evil, you retire from the public into your house where no enemy may see you; from those places of your house which are open and visible to the eyes of men you remove yourself into your room; even in your room you fear some witness from another quarter; you retire into your heart, there you mediate:  he is more inward than your heart.  Wherever, therefore, you shall have fled, there he is.  From yourself, whither will you flee?  Will you not follow yourself wherever you shall flee?  But since there is One more inward even than yourself, there is no place where you may flee from God angry but to God reconciled.  There is no place at all whither you may flee.  Will you flee from him? 
Flee unto him.

                          - Quoted in The Doctrine of God by Herman Bavinck, pg. 164  
 (Found also in Systematic Theology by Wayne Grudem, pg. 177)