These phrases hark back to the Lutheran movement. Take a look at the following:

http://mb-soft.com/believe/txc/solafide.htm

"Sola Fide - Sola Gratia - Sola Scriptura
General Information
Martin Luther began the Protestant Reformation based on the concepts of these three Latin phrases.

Sola Gratia means "by Divine Grace alone". That means that people cannot "earn" their way into Heaven by "Good Works" but are entirely dependent on the Generosity and Grace of God for it. This eliminated the value of "human merits" and said that God Alone could affect that outcome.

Sola Fide means "by Faith alone". This refers to the "human" side of the above concept. Since people could not actively "earn" their way into Heaven, this statement was necessary to describe exactly what requirement actually applies to us. It essentially says that we each must totally accept that the Lord is God, that He is the Only God, and that the person recognizes His Atonement as freeing mankind to be able to accept Him. When a person deeply believes that, it fulfills the human responsibility, which then encourages the Lord to provide His Grace.

Usually, a third Latin phrase is associated with those two, Sola Scriptura, which means "by the Bible alone". Rather than trusting any human to provide information about important religious information, that statement means to ONLY rely on what the Sacred Scripture says."

End of quote.


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