Choosing high goals is not necessarily a bad thing, even if you fail. As GK Chesterton put it, anything worth doing is worth doing badly. But to choose extraordinary goals without putting extraordinary resources into the quest to achieve them is a sign of foolishness and arrogance, not idealism.
“If you’re in it, you’re in it to win it; if not, you’re out of it” is a rule I came up with for myself about 15 years ago when it comes to contests of will.
Mead has a much nicer and more erudite way of putting it.
I read another quote from GK Chesterton recently, “What embitters the world is not excess of criticism, but absence of self-criticism.”
Again, a very true statement.