Sophiology is a controversial school of thought in Russian Orthodoxy which holds that Divine Wisdom is to be identified with God's essence, and that the Divine Wisdom is in some way expressed in the world as 'creaturely' wisdom. This notion has often been understood or misunderstood as introducing a feminine "fourth hypostasis" into the Trinity.

Sophia is a central idea in Hellenistic philosophy and religion, Platonism, Gnosticism and Christian theology. Originally carrying a meaning of "cleverness, skill", the later meaning of the term, close to the meaning of phronesis, was significantly shaped by the term philosophía as used by Plato.