Therefore, first and foremost it must be recognized that theology’s supreme author and first source is: God (James 3:17), for which reason theology is the “wisdom of God”155 (1 Cor. 2:6–7) because it is first about God, and then from God; Christ, for which reason theology is called the “words of Christ”156 (1 Tim. 6:3); and the Holy Spirit, for which reason he is called “the Spirit of wisdom” (Isa. 11:2; Eph. 1:17). From these designations we gather that theology exists by the revelation of the Father (Matt. 16:17), the Son (John 1:18), and the Holy Spirit (2 Peter 1:21), by illumination for perceiving revealed truth (Eph. 1:18), and by guidance in the truth that has been perceived (John 16:13; Ps. 25:5; 143:10). Therefore, let us entreat him with the most fervent prayers (James 1:5; 1 Kings 3:9), that he would give the Spirit to us (John 16:13) and anoint the eyes of our minds with salve (Rev. 3:18), that thus we might see marvelous things in the law of God (Ps. 119:18, 27).

PETRUS VAN MASTRICHT, THEORETICAL-PRACTICAL THEOLOGY, VOLUME 1: PROLEGOMENA, 237.