Read Malachi 1 today.

Malachi 1:6-10 NIV[6] “A son honors his father, and a slave his master. If I am a father, where is the honor due me? If I am a master, where is the respect due me?” says the Lord Almighty. “It is you priests who show contempt for my name. “But you ask, ‘How have we shown contempt for your name?’ [7] “By offering defiled food on my altar. “But you ask, ‘How have we defiled you?’ “By saying that the Lord’s table is contemptible. [8] When you offer blind animals for sacrifice, is that not wrong? When you sacrifice lame or diseased animals, is that not wrong? Try offering them to your governor! Would he be pleased with you? Would he accept you?” says the Lord Almighty. [9] “Now plead with God to be gracious to us. With such offerings from your hands, will he accept you?”—says the Lord Almighty. [10] “Oh, that one of you would shut the temple doors, so that you would not light useless fires on my altar! I am not pleased with you,” says the Lord Almighty, “and I will accept no offering from your hands.
This chapter of Malachi includes the accusation that the priests are bringing lame and diseased animals as offerings to God. It is as if they are saying to themselves, “Well, this lamb is probably going to die anyway. It is of no value to us. We may as well give it to God.”
Sometimes we do the same thing. We are willing to give God the things that are not valuable to us, but nothing we truly value. I have heard some people say they do not attend worship on Sunday because it is the only day they have to sleep in. In other words, that time is valuable. They are unwilling to give God any of their ‘valuable’ time.
This gets to the heart of our relationship with God, and our worship of God. If God is truly valuable to us, we will make valuable offerings of our time, our talents, and our treasures. What is the most valuable thing you will give to God today?