 Schiller follows these philosophical considerations with advice to fellow tragedians, promising to isolate the “conditions under which the pleasure of the emotion would be produced with the most certainty and the greatest force” (NA XX, 154/E 6). A tragedy will fail both if the audience’s sympathy is too weak and if it is too strongly aroused and replaced by outrage at the instigator of the suffering (NA XX, 154/E 7). The best tragedies will evoke both an unavoidable moral conflict and the hero’s willing embrace of it (NA XX, 156–7/E 9). The images of suffering that tragedy presents should be lively and vivid; they should strike us as universally true; the plot must allow the suffering to build momentum but also be balanced and varied (NA XX, 159–164/E 11–14). The most successful tragedian will use these and other principles to stimulate compassion with suffering that gives evidence of humans’ highest calling (NA XX, 165–67/E 16–18).