In Revelation 5:11 it appears that 10 billion angels are worshipping the Lamb. Why? Because He is worthy! How do they know? They’ve watched His redemptive plan for humanity unfold from the beginning of time to that present hour in heaven!
God is the only one who can “righteously” brag on His accomplishments (Isaiah 44:6-8; 45:21; 46:9; Hosea 13:4) and in Ephesians chapter two He is doing just that. Anything that we accomplish we can only do it because of what has been given to us from God but from Genesis to Revelation we see that God accomplishes our redemption because of His power and His love and His grace and His mercy! It is all God!