The 1689 London Baptist Confession of Faith in Modern English by Founder's Press. The Westminster Confession of Faith, as ingenious as it was, was a rough outline for the doctrinal refinement that would follow, and I have found no document or confessional statement to be more refined doctrinally than the 1689 confession. If you want to know what I believe, read this confession. I affirm the confession because I cannot refute any of it's key doctrines from the Bible alone. Even the first section is a masterclass summary of Biblical doctrine:
1:1 The Holy Scriptures are the only sufficient, certain, and infallible standard of all saving knowledge, faith, and obedience.1 The light of nature and the works of creation and providence so clearly demonstrate the goodness, wisdom, and power of God that people are left without excuse; however, these demonstrations are not sufficient to give the knowledge of God and His will that is necessary for salvation.2 Therefore, the Lord was pleased at different times and in various ways to reveal Himself and to declare His will to His church.3 To preserve and propagate the truth better and to establish and comfort the church with greater certainty against the corruption of the flesh and the malice of Satan and the world, the Lord put this revelation completely in writing. Therefore, the Holy Scriptures are absolutely necessary, because God’s former ways of revealing His will to His people have now ceased.4