Sermon XI, "Legal and Evangelical Justification Distinguished," in Sermons of the Rev. Ichabod S. Spencer, D.D., [vol. I] (Philadelphia: Presbyterian Board of Publication, copyright 1855), p. 223

Jesus Christ is the foundation and cause, and faith in him is the instrument of justification. Jesus Christ is the meritorious and efficient cause of our justification, and faith is that act by which we are made partaker…