The name of God = Kyrios = IHVH. The name that means the power and reign of the Lord. To use his name is to trust and believe his divinity. "Therefore God exalted him to the highest place and gave him the name that is above every name, that at the name of Jesus every knee should bow, in heaven and on earth and under the earth, and every tongue acknowledge that Jesus Christ is Lord, to the glory of God the Father." (Philippians 2,9) The window depicts Jesus Christ surrounded by lightning. In his left hand he's holding a Holy Bible, Word of God. "His face was like the sun shining in all its brilliance." (Revelation 1,16)