A letter on psalmody.

Shewing, that human composures ought not to be used in Christian-worship, in singing the praises of God. : What thing soever I command you, observe to do it: thou shalt not add thereto, nor diminish from it.--Deut. 12. 32. Se also Jer. 6. 16. Isa. 8. 20, and John 14. 15, and Mat. 28. 20. : To which is added, part of a lecture; or, the substance of one, from these words, And to Jesus the mediator of the new covenant. Heb. 12. 14. : Also, a brief description of the Christian grace of hope. That hope that doth accompany and comprehend salvation.

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