We think that worship is mainly about what we can get out if it. What matters is if we're "fed". But Amos warns us that worship ought to transform us on a daily basis. That worship is really about proclaiming that God is king every day of the week, not just Sundays.
Amos pictures God as a lion, roaring God's judgment from Mt. Zion. We don't like to think of God as a judge. But the biblical picture of God as judge is founded in God's love as our Father in Heaven. We can hear God's judgment as words as a firm love calling us to be whole.