Reverend Capon is unable to utter the lion's roar.

“‘The monks [whom you are speaking of] preach various teachings, but still they are not able to utter “the lion’s roar.”... Nor are they able to refute and convert evil persons who go against the correct teaching. Monks of this kind can bring no benefit either to themselves or to the populace. You should realize that they are in fact shirkers and idlers. Though they are careful in observing the precepts and maintain spotless conduct, you should realize that they cannot achieve anything. [Then a monk raises “the lion’s roar.”...] Those who break the precepts, upon listening to his preaching, are all enraged to the point where they attack him. This preacher of the Law, though he may in the end lose his life, is still worthy of being called a person who observes the precepts and brings benefits to both himself and others.’” -- Opening of the Eyes