useless trivia: What Word Means: A Unit Of Weight Of 12 Grains - A Silver Coin Of Bolivia?

Questions

Who invented the idea of infantile sexuality or the Oedipus complex?

'The greatest lesson in life is to know that even fools are right sometimes.'?

'The greatest of all faults, I should say, is to be conscious of none.'?

'Distrust any enterprise that requires new clothes.'?

'Do not follow where the path may lead. Go instead where there is no path and leave a trail.'?