Just as this covering of thoughts is of no use without a real covering, so faith is of no use without works. Faith is only the receiving organ of a teaching that leads to a certain activity; whoever merely receives these instructions in his faith but does not act on them, ask: What then does this instruction serve him for? I say: To nothing else than to a foolish critic, just as all the rules of musical art are of no use to one, and he is not able to perform even the easiest and simplest; but such a mere rule-holder is then foolish, and criticizes every artist as if he could really perform the most excellent himself. But I say: A beggar musician is still worth more than such a critic, who himself can do nothing, but wants to judge everything. – The Earth, Chapter 73, Paragraph 11