What is the concept of theology?

Simply put, theology is speaking about God. The term 'theology' comes from two Greek words: theos (God) and logos (word). That finite beings can even speak of God at all is something of a miracle, made possible by God's self-revelation culminating in Jesus Christ, the Word (revelation of God) made flesh.

Theology is the study of God, God’s character, God’s actions in relation to the cosmos, and especially God’s relationship to humanity (the character and history of humankind) in its responsive relationship to God within the panorama of the world and history, space, and time.