“It is better to keep silence and be [a Christian] than to talk and not to be. Teaching is an excellent thing, provided the speaker practices what he teaches. Now, there is one Teacher who spoke and it came to pass. And even what He did silently is worthy of the Father. He who has truly made the words of Jesus his own is able also to hear His silence, so that he may be perfect: so that he may act through his speech and be known through his silence” (15, 1f.).