This image (Darth Krashen?) works for me on many levels. Comprehensible input is the most powerful force in the linguistic universe. All other approaches are insignificant compared to it. We need to take advantage of C.I. and use it to our full advantage in our classrooms.
When I hear about colleagues teaching with limited C.I. (i.e., primarily in English or with incomprehensible immersion) it drives me crazy. It is like a fellow officer mocking, belittling or refusing to use the most effective weapon. A fellow educator not knowing about or using C.I. is unfathomable to me; nearly traitorous to the students. Disturbing indeed.