Although both the Bible (special revelation) and all of creation (general revelation) are given by God to man, only the Bible constitutes inherent final authority.
God’s general revelation to man is continuous (Psalm 19:2), wordless (Psalm 19:3) and worldwide in scope (Psalm 19:4). General revelation teaches the existence of God as a divine Being, His power and His Glory (Job 12:7-9; Psalm 19:1 Romans 1:20).
Special revelation is much narrower in focus in that its revelation centers on the person of Jesus Christ (John 1:1, 14). This revelation was revealed by God to only a selection of individuals who by their speech and writings spread the exact revelation that they received (1 John 1:1-3). Reading or hearing of the Scriptures then is the only way by which special revelation can be known (Romans 10:14-15).
The authority of general revelation is restricted to judgment of those who reject it (Romans 1:28). The authority of special revelation is specific and comprehensive to enable and demand belief and obedience (Acts 17:30; 2 Timothy 3:15-17).
Both God’s general and special revelation is available to us. Do you believe and obey what God’s reveals?
 Paul Enns. The Moody Handbook of Theology. Revised and Expanded. Chicago, IL: Moody Publishers, 2008. p 158.