Prohibition will work great injury to the cause of temperance. It is a species of intemperance within itself, for it goes beyond the bounds of reason in that it attempts to control a man's appetite by legislation, and makes a crime out of things that are not crimes. A Prohibition law strikes a blow at the very principles upon which our government was founded.
Source, in full
Alledgedly from a speech to the Illinois House of Representatives (18 December 1840) its called "a remarkable piece of spurious Lincolniana" by Merrill D. Peterson: Lincoln in American Memory. Oxford UP 1995, books.google. Cf.Spurious archive.org and Harry Miller Lydenberg: Lincoln and Prohibition, Blazes on a Zigzag Trail. Proceedings Of The American Antiquarian Society, No. 1/1952 pdf.