The prophet Amos describes three major sins: the sins of covetousness (verse 6); indifference and oppression of the poor, the needy and the weak (verse 7); and unrestricted promotion of self-advantage (verse 8). These are the effects of rejecting the Teacher, the Instructor.
As Israel's destruction neared, conditions worsened drastically. The courts were totally corrupt with the judges in collusion with the lawyers, selling their verdicts to the highest bidder! Amos says, "Therefore the prudent keep silent at that time, for it is an evil time" (Amos 5:13). God advises that the best thing to do was to remain silent and go on with one's life because one could not get a good judgment from the judges! The best thing to do was to settle out of court, if possible.
All the while this corruption ran rampant in Israel, people were worshipping God in droves! A high percentage of the people attended services and kept the festivals. They pilgrimaged to the centers of religion in Bethel, Gilgal, and Beersheba where the people kept the feasts. The commentators concede Israel may still have been keeping some of the holy days of God.
Notice what God says:
I hate, I despise your feast days, and I do not savor your sacred assemblies. Though you offer Me burnt offerings [worship] and your grain offerings, I will not accept them, nor will I regard your fattened peace offerings. Take away from Me the noise of your songs, for I will not hear the melody of your stringed instruments. (Amos 5:21-23)
God hated their feasts, their offerings, and their singing in His name. The wording indicates nausea! Compare this to Revelation 3:16.
Most likely Israel blended the worship of the true God with the worship of Baal and Ashtoreth and other local deities. Despite their worship, this syncretism caused a separation from God. They were at odds with Him, even though, in their minds, they worshipped Him. Society immediately degenerated because the people's love waxed cold. Their worship produced no good effect because it came from an unrighteous source.
When one studies the New Testament, the pattern unfortunately continues. The history of the true church has been one of waxing and waning purity as well. Generally, brief periods of unity and growth precede longer periods of disunity and stagnation. Small, scattered congregations barely hold themselves together during these times and do no active work.
The pattern is very similar to that established in ancient Israel. God would raise up a man, and he would lead a Work and establish what would be orthodox. As time went by, two groups would emerge. One group would be more conservative, disposed to maintain orthodox doctrine and to hold on to their traditions. The other element would be broader-minded, not bound by orthodox or traditional forms.
The appearance of these two groups presents a Christian with a complex question: "I see it, but what do I do?" Christ answers: "Beware of false prophets, who come to you in sheep's clothing, but inwardly they are ravenous wolves. You will know them by their fruits" (Matthew 7:15-16).
Such fruit as an increase in marital and relationship problems, uncertain judgment regarding what is right and wrong, a lack of discussion of God and His Word, indifference toward prayer and Bible study, relaxation toward making an effective and powerful work, and similar attitudes are ones of which to be wary. In such an atmosphere, if a Christian is not careful, he can take on the enveloping and smothering attitude that invariably arises, which will eventually snuff out his spiritual life.