"Vacuole is like a balloon full of water" Yes, it's full of water, it's flexible so it can expand to help a plant cell grow.
"An aimless person is like the pendulum which merely swings to and fro without any forward movement. In life two types of people meet failure: one who thinks right and does not follow up with action; the other, who does the actions without thinking."
"I would argue socialism is like smoking, there's a decent amount you may get away with without killing the user, but the safest amount is the least amount. That's the libertarian opinion, but do the facts support it? "