Systematic theology from the doctrine of Scripture to the last things. Take the parts in order, or begin with any one.
Before we study what Scripture teaches, we ask what theology is, where it gets its authority, and how Scripture distinguishes the Gospel that saves, the whole counsel of God that disciples obey, and the matters God leaves to conscience.
God has spoken. Bibliology studies the inspiration, inerrancy, infallibility, authority, sufficiency, and preservation of the written Word of God.
Who is God? The one true God has revealed Himself as Father, Son, and Holy Spirit, and He has made known His character, His works, and His ways.
Jesus Christ is eternally God and truly man, one person in two natures. Christology studies His deity, His humanity, His work, and His resurrection.
The Holy Spirit is a divine person, not an impersonal force. He convicts, regenerates, indwells, seals, and empowers believers through the Word He inspired.
God made man in His own image, male and female. Anthropology studies human nature, the image of God, and the genuine responsibility of every person before Him.
Sin entered the world through Adam, and all have sinned. Hamartiology studies the nature of sin, its consequences, and why no one can save himself.
Salvation is by grace through faith in Jesus Christ alone. Soteriology studies God's saving purpose, the Gospel call, repentance and faith, justification, regeneration, adoption, sanctification, and the security of the believer.
Christ builds His church, and His churches have never ceased from the earth. Ecclesiology studies the local church, its perpetuity, believer's baptism by immersion, the Lord's Supper, church government, and the priesthood of believers.
Scripture reveals a created spiritual order: holy angels who serve God, and fallen angels led by Satan, whose defeat Christ secured at the cross.
Christ is coming again. Eschatology studies the rapture of the church, the tribulation, Christ's millennial reign, the final judgment, and the eternal state.