My favourite analogy is that a successful business is like a machine that takes money and then, one hour later, spits out 1.2 times whatever amount you put in.

My favourite analogy is that a successful business is like a machine that takes money and then, one hour later, spits out 1.2 times whatever amount you put in. You could start by feeding the machine $1, waiting an hour, then feeding the $1.20 back in, and so on. But you'll get richer far quicker if you persuade somebody to lend you $1M and directly dump that in to the machine.