Never

“The man who does not read has no advantage over the man who cannot read.”
― Mark Twain

“Here's to the crazy ones. The misfits. The rebels. The troublemakers. The round pegs in the square holes. The ones who see things differently. They're not fond of rules. And they have no respect for the status quo. You can quote them, disagree with them, glorify or vilify them. About the only thing you can't do is ignore them. Because they change things. They push the human race forward. And while some may see them as the crazy ones, we see genius. Because the people who are crazy enough to think they can change the world, are the ones who do.”
― Steve Jobs

“The fool doth think he is wise, but the wise man knows himself to be a fool.”
― William Shakespeare, As You Like It

“Talent hits a target no one else can hit. Genius hits a target no one else can see.”
― Arthur Schopenhauer