"My plea therefore is this: Let us get our instruments tightly strung and our melodies sweetly sung. Let us not die with our music still in us. Let us rather use this precious mortal probation to move confidently and gloriously upward toward the eternal life which God our Father gives to those who keep his commandments."

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If then, Moses so distinctly announces that there is in us not only a faculty, but also a facility for keeping all commandments, why are we sweating so much? ... What need is there now of Christ or of Spirit? We have found a passage that asserts freedom of choice, but also distinctly teaches that the keeping of the commandments is easy.

— Martin Luther