God takes disobedience to His commands very seriously, as we see from the account of Saul and the Amalekites. The consequences for Saul’s greed and neglect of God’s clear commands were grave - he lost his crown, his life, and his heritage. We see that the church today is behaving somewhat like Saul. God has told us how He would be worshiped, but many have invented their own forms of worship to suit their own desires rather than God’s commands.
We are all urged to pay careful attention to God’s Word and to be doers of it and not hearers only.