Why don’t we sing to God with joy if God is with us? If you are going to worship the name of Your creator, don’t you do it with good will, to let people who praise God understand that it is because He has always been good.
Let us praise God also because even though we are dejected, falling apart, we will not die because His grace and His power keep us and sustain us always.
If you will not give a voluntary worship to God, then do not do that sacrifice that will not please God. God deserves the best of all His creation, do everything with love for the glory of God.