Reflection
What is humanity’s greatest sin? Think about that for a moment. Is it murder? Hatred? Racism? The desecration of the planet? All of these are serious problems—serious sins. But what is the greatest sin? 

Psalm 50 begins with a great summoning of all nations. The LORD is about to enter into judgment. But what charge does He bring against His people? He does not accuse them of heinous crimes, or the desecration of His temple. I bring no charges against you concerning your sacrifices or concerning your burnt offerings, which are ever before me (v. 8). Instead, God calls for thank offerings. The LORD wants His people to have thankful hearts.

There is something rather anticlimactic about this call for thanksgiving. My initial reaction is one of surprise. I thought we had a serious problem here. Why summon the nations to a great gathering unless there is a declaration of some significance. Surely a lack of thanksgiving is an offence of no great consequence. Or is it? Apparently in God’s view it is of great importance.

In his epistle to the Romans, St. Paul attributes a lack of thankfulness to the blinding power and deception of sin. For since the creation of the world His invisible attributes are clearly seen, being understood by the things that are made, even His eternal power and Godhead, so that they are without excuse, because, although they knew God, they did not glorify Him as God, nor were thankful, but became futile in their thoughts, and their foolish hearts were darkened (Romans 1:20-21).

Because of its long-term consequences, a failure to offer thanks may be the gravest sin of all.

Response
LORD God, I owe my life to you. Jesus, I have so much to be thankful for. Every day is a gift. Amen.