Justification By Faith

I wish the reader to understand that as often as we mention faith alone in this question, we are not thinking of a dead faith, which worketh not by love, but holding faith to be the only cause of justification. It is therefore faith alone which justifies, and yet the faith which justifies is not alone: just as it is the heat alone of the sun which warms the earth, and yet in the sun it is not alone, because it is constantly cojoined with light. Wherefore we do not seperate the whole grace of regeneration from faith, but claim the power and faculty of justifying entirely for faith, as we ought.

John Calvin, Brothers, We Are Not Professionals, pg. 23