Systematic theology in the context of "1689 Baptist Confession of Faith"

Wesleyan theology, otherwise known as Wesleyan–Arminian theology, or Methodist theology, is a theological tradition in Protestant Christianity based upon the ministry of the 18th-century evangelical reformer brothers John Wesley and Charles Wesley. More broadly it refers to the theological system inferred from the various sermons (e.g. the Forty-four Sermons), theological treatises, letters, journals, diaries, hymns, and other spiritual writings of the Wesleys and their contemporary coadjutors such as John William Fletcher, Methodism's systematic theologian.

In 1736, the Wesley brothers travelled to the Georgia colony in America as Christian missionaries; they left rather disheartened at what they saw. Both of them subsequently had "religious experiences", especially John in 1738, being greatly influenced by the Moravian Christians. They began to organize a renewal movement within the Church of England to focus on personal faith and holiness, putting emphasis on the importance of growth in grace after the New Birth. Unique to Wesleyan Methodism is its definition of sin: a "voluntary transgression of a known law of God." Methodist doctrine teaches that the life of a Christian subsequent to the New Birth should be characterized by holiness, living victoriously over sin. Calling it "the grand depositum" of the Methodist faith, John Wesley taught that the propagation of the doctrine of entire sanctification—the work of grace that enables Christians to be made perfect in love and be made free from the carnal nature—was the reason that God raised up the Methodists in the world.

Confessional Lutheranism is a name used by Lutherans to designate those who believe in the doctrines taught in the Book of Concord of 1580 (the Lutheran confessional documents) in their entirety. Confessional Lutherans maintain that faithfulness to the Book of Concord, which is a summary of the teachings found in Christian scripture, requires attention to how that faith is actually being preached, taught, and put into practice. Confessional Lutherans believe that this is a vital part of their identity as Lutherans.

The term "Confessional Lutheran" is generally used among more conservative churches found in organizations like the International Lutheran Council (ILC), Confessional Evangelical Lutheran Conference (CELC), and the Global Confessional and Missional Lutheran Forum, though other Confessional Lutheran denominations are independent of the same. Confessional denominations subscribe to the Book of Concord because (quia) it agrees with the Bible. In contrast, churches of the larger Lutheran World Federation subscribe to the Book of Concord as an exposition of faith insofar as (quatenus) it agrees with the Christian Bible.

Institutes of the Christian Religion (Latin: Institutio Christianae Religionis) is John Calvin's seminal work of systematic theology. Regarded as one of the most influential works of Protestant theology, it was published in Latin in 1536 in Basel at the same time as Henry VIII of England's Dissolution of the Monasteries and in his native French language in 1541. The definitive editions appeared in 1559 in Latin and in 1560 in French.

The book was written as an introductory textbook on the Protestant creed for those with some previous knowledge of theology and covered a broad range of theological topics from the doctrines of church and sacraments to justification by faith alone and Christian liberty. It vigorously attacked the teachings of those Calvin considered unorthodox, particularly Roman Catholicism, to which Calvin says he had been "strongly devoted" before his conversion to Protestantism.

Mystical theology is the branch of theology in the Christian tradition that deals with divine encounter and the self-communication of God with the faithful; such as to explain mystical practices and states, as induced by contemplative practices such as contemplative prayer, called theoria from the Greek for contemplation.

It can be contrasted to an extent with propositional theology e.g., systematic theology, dogmatic theology, scholastic theology, ecclesiology or treated as their forerunner: its subject and aim is not knowledge but divine encounter.