Christian era was arranged in seven periods, corresponding to the seven apocalyptic epistles, trumpets, and seals. In his treatment of his theme, he repudiated philosophy, scholasticism, and tradition, and held simply by Scripture. He is thus the founder of a purely biblical theology. He attached himself as closely as possible to the prevailing predestinationist orthodoxy, but only externally. In his view the sacred history in its various epochs adjusted itself to the needs of human personality, and to the growing capacity for appropriating it. Hence it was not the idea of election, but that of grace, that prevailed in his system. Christ is the centre of all history, spiritual, ecclesiastical, and civil; and so everything in Scripture, history, doctrine, and prophecy, necessarily and immediately stands related to him. The O.T. prophecies and types point to the Christ that was to come in the flesh, and all history after Christ points to his second coming; and O. and N.T. give an outline of ecclesiastical and civil history down to the end of time. Thus typology formed the basis of the Cocceian theology. In exegesis, however, Cocceius avoided all arbitrary allegorizing. It was with him an axiom in hermeneutics, _Id significan verba, quod significare possunt in integra oratione, sic ut omnino inter se conveniant_. Yet his typology led him, and still more many of his adherents, into fantastic exegetical errors in the prophetic treatment of the seven apocalyptic periods.