The document discusses arguments for only singing (without musical instruments) in worship based on passages from the New Testament and Old Testament. It notes that while many use Psalms to argue for instruments, most passages about music in Psalms refer to singing rather than instruments. The document argues that instruments cannot fulfill commands to sing praises or the "song of Moses and the Lamb" from Revelation. It suggests we should do what God directs based on the Bible rather than try to justify our own practices.