But it is hard to know them from friends, they are so obsequious and full of protestations; for a wolf resembles a dog, so doth a flatterer a friend.
(Sir Walter Raleigh (1552-1618), British author, soldier, explorer. repr. In The Works of Sir Walter Raleigh, vol. 2 (1751), also in Advice to a Son (1962). "Wisest Men Have Been Abused by Flatterers," ch. 3, Instructions to His Son and to Posterity (1632).)
We should not talk about our friends: otherwise we will talk away the feeling of friendship.
(Friedrich Nietzsche (1844-1900), German philosopher, classical scholar, critic of culture. Friedrich Nietzsche, Sämtliche Werke: Kritische Studienausgabe, vol. 2, p. 489, eds. Giorgio Colli and Mazzino Montinari, Berlin, de Gruyter (1980). Mixed Opinions and Maxims, aphorism 252, "Silentium," (1879).
The Latin word silentium in the title means "silence.")