For Jews the highest human authority was the high priest. For us Christians, the highest human authorities were God’s messengers, the apostles. Jesus, God’s Messenger and High Priest, is the ultimate authority in the church.
“Taste and see” does not mean, “Check out God’s credentials.” Instead, it is a warm invitation: “Try this; I know you’ll like it.” When we take the first step of obedience in following God, we cannot help discovering that He is good and kind. When we begin the Christian life, our knowledge of God is partial and incomplete. As we trust Him daily, we experience how good He is.