God is one in essence, but trinity in persons (hypostases): God the Father, God the Son, God the Holy Spirit - the Trinity is consubstantial and indivisible.
God is a spirit who has all perfections. He is merciful to everyone, but also just: he has mercy and rewards for good, and punishes for evil.
God is omnipresent and all-seeing, i.e. He is everywhere, sees everything, knows everything.
God is omnipotent - He created everything “with His one word”, supports everything, preserves everything, provides for everything and everyone.
God is wise, he arranged everything wisely, he directs everything for the better, for the benefit of man.
God is eternal, that is, he has neither beginning nor end, but always was, is and will be.