The Bible alone is the God breathed, inerrant, infallible, Word of God. It is sufficient, necessary, authoritative, and clear as our ultimate standard for all thought and human experience. It alone provides us with a worldview that is: the ultimate coherent explanation of everything, livable, hope and fulfillment.
God created man in his image (i.e. with an intellect, will and emotions, ruling over creation). But man sinned against God the results were man became sinners by inheritance, imputation and imitation.
The Son became incarnate to rescue man from sin. Christ suffered and died upon the cross, and was resurrected three days later, to pay the penalty for our sins and purchase a place in heaven for us. Christ offers this as a free gift to all by faith. It is not earned nor deserved. Saving faith is trusting in Jesus alone for salvation.
Christ alone is our living prophet, priest and king, never ceasing to teach, intercede and rule.
Christ established one never ceasing, universal, united, church which is comprised of all believers; yet it is exemplified in a diversity of local churches.
We know all these things to be true since this is God's testimony in the Bible. The Holy Spirit's inter-witness testifies this to us. If it's rejected the alternative is utter irrationality.
Christian Epistemology: All knowledge finds its source from God's revelation.
Metaphysics: All things finds their source, support and end from God.
Ethics: All objective moral values/duties find their source, support and end from God's commands (that express God's essential goodness).