25 quotes from Bill Gates that take you inside the mind of the world's richest man

Ramin Talaie / GettyBill Gates ranks No. 1 on Business Insider's list of the 50 richest people on earth.Bill Gates isn't budging from his longstanding position as the richest person on earth. With a net worth of $87.4 billion, Gates is $20 billion richer than the next-wealthiest person - Spanish fashion titan Amancio Ortega - according to Wealth-X data from our new ranking of the 50 richest people in the world.

Gates made his billions building juggernaut software maker Microsoft, but his main venture these days is giving it all away through the Bill & Melinda Gates Foundation, which he and his wife set up in 2000 as a vehicle for managing their charitable causes, like eradicating infectious diseases and hunger.