Divine Nature
“The divine nature... surpasses every mental concept. For it is all together inaccessible to reasoning and conjecture, nor has there been found any human faculty capable of perceiving the incomprehensible; for we cannot devise a means of understanding inconceivable things. The way that leads to the knowledge of the divine essence is in accessible to thought. For He is invisible in nature, but becomes visible in His energies, for He may be contemplated in the things that I referred to him...If a man’s heart has been purified from every creature and all unruly affections, he will see the image of the divine nature in its own beauty,...for God imprinted on our nature the likeness of the glories of His own nature.” (St. Gregory of Nyssa)
“The divine nature exists undividedly in three distinct Persons: the Father, the Son, and the Holy Spirit. The Son is begotten before all time and ages from the essence of the Father, but His begetting does not divide the Father's essence. The Holy Spirit proceeds before all time and ages from the Father, but His procession does not divide the Father's essence. The Persons are distinct or different, but the essence is one and undivided. Therefore, we believe in the Holy Trinity, our one God and Lord.” (Orthodox Study Bible, Deuteronomy 6:4)
“We must always make that distinction, and we must also make the point strongly that the One God is not the Father, Son, and Holy Spirit, all together somehow as one Person. There is one divine nature, but there are three Persons or hypostases. There is one Divinity, but there are three who are divine: the Father, the Son, and the Spirit.” (Father Thomas Hopko)
“Jesus Christ is one Person with two natures: human and divine. His divine nature is from all eternity and is revealed in that He is both God's Son and the Lord. His human nature is revealed in His being born of the seed of David according to the flesh: He was conceived and born of the Virgin Mary while never ceasing to be God.” (Orthodox Study Bible, Romans 1:3)
“The power to lead a godly life comes not from within us but from God. Because we don’t have the resources to be truly godly, God allows us to “share His divine nature” in order to keep us from sin and help us live for Him…God by His Spirit empowers us with His own goodness” (Life Application Study Bible, 2 Peter 1:3-4)