The "omni's" of god...
We know that God is the 'unlimited being', or the ultimate
goal of the striving of our intellect and our will. Thus His
essence is His existence, and perfection is His nature. But
because He is infinite and we are finite, we can only consider His
nature in terms we can understand, and these terms by definition will
be wrong (not up to par, or not infinite). Inherent within
this dilemma, combined with the search instinct within us, is the
tendency (need?) to create images of God in our minds. We
must be careful to not allow these images to take the place of the true
nature of God, which is always beyond our intellectual grasp.
Hence monotheism is required in the consideration of the ultimate
being. To have God described as having different parts, or as
being separate from another god, would limit the true nature of the
perfectly unified essence. To have a god that is evolving
toward total consciousness, as in some psychoanalytically oriented
philosophies, one must accept the improper view that God can change.
The Presbyterian Westminster Catechism answers the question 'What is God?' in what is considered by many to be the best definition of God's nature penned by man: 'God is a Spirit, infinite, eternal, and unchangeable in His being, wisdom, power, holiness, justice, goodness and truth.'
Some of God's attributes, His knowledge, His location and His abilities are unavoidably described in means that we can attempt to understand. These 'unknowable' attributes are brought into analogy for us to understand in concepts such as 'Omniscient,' 'Omnipresent,' and 'Omnipotent.' These words do not really describe God in the manner that He is, but rather in the matter that He is in comparison to our finitude. They help us to understand the non-understandable with terms we cannot understand! Therefore the glimpse they provide into the infinite is helpful, if incomplete. But they pass the test of answering the 'religious a priori' with answers apart from ourselves or our experiences, in a manner that is close to us.
Since God is the ultimate 'knower' or all things, He is by definition ALL KNOWING (Omniscient):
...for God...knows everything."
1 John 3:20b
Since God transcends His creation in space and time, He is by definition ALL PRESENT (Omnipresent):
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." Psalm 139:7-8
Since God created all things that exists, He by definition is the source of ALL POWER (Omnipotent):
Ah, Sovereign Lord, you have made the heavens and the earth by your great power and outstretched arm. Nothing is too hard for you." Jeremiah 32:17
The Apostle Paul sums up the nature of God:
Oh the depths of the riches of the wisdom and knowledge of God! How unsearchable His judgments, and His path beyond tracing out! Who has know the mind of the Lord? Or who has been His counselor? Who has ever given to God, that God should repay Him? For from Him and through Him are all things. To Him be the glory forever!" Romans 11:33-36