When you sing uninspired songs you are singing what some man "thinks" about God. When you sing Psalms you are singing what God says about Himself. I believe that God gives us explicit instructions on how He is to be worshipped. Has a singer of uninspired hymns for many years I have only begun to see this in the last year.
If Psalms are the best for singing and showing praise unto God why would you want to use anything else? I fear we have been guilty of offering "strange fire" before the Lord. Has Brian Schwertley said in one of his messages on this subject: "Why can't you just do what your told to do?"
Why do you have to rebel against God?

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Psa 55:16 As for me, I will call upon God; and the LORD shall save me.
Psa 55:17 Evening, and morning, and at noon, will I pray, and cry aloud: and he shall hear my voice.
James Farley
Husband of Melissa and father of Ann.
Members of Redeemer Church ARP, Blacksburg Va.
http://www.redeemerblacksburg.org/