We come to the book of Zephaniah, a little known prophecy of a few pages. His name means "God has hidden or protected" – maybe because his parents lived in an uncertain time.
His main theme is “the day of the Lord” a reference to Judgement on those who sin against God and of blessing for those who seek to follow God. It’s in direct reference to the apostasy of the nation and their stubbornness to turn back from idolatry to Godly worship. It is a salient reminder for all of us in respect the seriousness we treat God with.
Sometimes we are guilty of using God as a handy backstop and other things come in front, again and again. What God is really after is obedience to his word. Something we too easily think it's optional. But faithfulness is known to God – and he delights in it!