The definition of truth according to Webster's is conformity to fact or actuality, reality, actuality. Ryrie defines truth as "agreement to that which is represented it includes veracity, faithfulness, and consistency." To say that God is true is to say that he is consistent with himself. He is all that he should be; he has revealed himself as he really is. His revelations are completely reliable.
For man to understand that truth is knowable to him and life does make sense, he should first understand that all truth is known to God regardless of if it is found in the Bible or other sources. Therefore, it should be called God's truth because Colossians 2:3b says, "are hid all treasures of wisdom and knowledge." People think that God has hid his truth from them, making it inaccessible to man so they cannot understand God's truth. Men do not practice good exegesis when the word "hid" is taken out of context and means, to some people, that God is hiding his truth from them. I think that Paul is trying to say that the truth about Christ is the focal center to which all other truth about everything in creation is connected. That is to say, God is truth. We are totally dependent upon God to know truth because God is the creator of all things. He is our source for knowledge. God revealed both grace and truth to us by incarnating himself. Truth is unchanging and universal; it is not relative but is absolute. (Holmes 8).
The Old Testament term for truth is emeth. This is primarily ethical rather epistemological term. Truth depends on unchanging reality, is personal, cannot change, and remains the same for every time and place in creation. It is absolute. To say these things is to say that God's knowledge is complete and perfectly true. Truth is the implication that God exist. So one cannot believe in truth and believe that God is non-existence. We need a renewed commitment to the truth as found in the Scriptures and as summarized in theological and doctrinal propositions.