Play Your Part
John the Baptist came to prepare the way for the Lord. That was his purpose on earth and he knew it. But John's disciples tried to incite him to jealousy over Jesus' ministry! John relied, "A man must be content to receive the gift.
You have a unique role in the body of Christ. There is no point in being jealous of someone else's spiritual gifts or ministry.
God is the only source for gifts and His plan is perfect for each of us. If your gift is giving, then give with zeal. If your gift is helping, then help somebody! Rather than worrying about what others are doing, figure out what God wants and go do it!