Malachi is the final book of the Old Testament. It emphasizes the importance of obeying God's laws, questioning true faith amidst God's blessings and judgments, and trusting in God's promises despite appearances to the contrary. Malachi grapples with the issue of why the people of God are experiencing hardship and how to respond in faith, prophesying of the coming Messiah who will reconcile the people with God. In a nutshell, Malachi challenges us to live faithfully and wait confidently for the glory of the Lord to be revealed.