I used to wonder how praising God can be a sacrifice, but over the years I've finally figured it out. There will come unhappy moments in our lives when we will experience grief, betrayal, sadness, weakness, and unpleasant circumstances. We may wonder why God is allowing these things to happen to us. We may feel abandoned and forsaken. It's during these moments, that we won't feel like praising God--that's when it becomes a sacrifice. Most of you know what I'm talking about. It's when you're so heavy with burdens and despondency that it's an effort to get out of bed, to eat, to put one foot in front of the other, to face the day.
But here is what else I've learned--get up and praise Him, because His mercies are new each day! Your circumstance is temporary. There will come a day when you WILL feel better. He has not forsaken you. He is walking through the good AND the bad right beside you. All things (including the bad) work together for good for those who love God. You may not be able to see the good in your circumstance right now, but there will come a time when you will. If nothing else, it will make you stronger. Praising God and thanking Him WILL make you feel better. So offer up the sacrifice of praise and change your moment!