Proverb states that once tricked, it's not your fault. Used when trusting someone again after being tricked. Can be used to highlight learning from mistakes. "Fool me twice" is unnecessary since most people know it
Nietzsche delivered inaugural speech "Homer and Classical Philology" at Basel University in 1869. "The Birth of Tragedy" (1871-1872) exposed his Greek philology studies. "Thoughts Out of Season" (1873-1876) contained four essays on philosophy and culture
Sea urchins are spherical animals with protective spines. They move using hydraulically operated tube feet. Their outer shell is usually washed up on beaches
True power comes from knowledge, not physical strength. Knowledge provides permanent and stable control over events. Physical strength cannot fulfill dreams without knowledge. Knowledge means wisdom, not physical strength
Aphorism is a short saying that observes general truths. Often concise and mildly humorous, intended for wisdom. Famous aphorisms can become cliché over time
Original phrase appears in 1728 French priest's observations. Henry IV and Camillus used similar phrases in their speeches. Expression first appeared in John Oldmixon & Dominique Bouhours' book