There’s a difference between being a part of God’s great work and wanting personal greatness through God’s work. If you’re not sure where you fall, examine your motives. If the greatest benefactor of your achievements is yourself, then perhaps your ambition is out of control. Seek to honor God and others, not yourself.
Matthew 16:24 Jesus said to the disciples, “If any of you wants to be my follower, you must put aside your selfish ambition, shoulder your cross, and follow me.