25 quotes that take you inside Elon Musk's brilliant, eccentric mind

He went on to found and sell a startup to Compaq for $300 million in 1999, and parlayed that into a major stake in PayPal, which eBay bought for $1.5 billion in 2002.

He then got into three world-changing companies: Tesla, SpaceX, and Solar City. And though Tesla and SpaceX nearly went bankrupt, each company is now shifting its respective industry.

Yet Musk - with his 100-hour workweeks, estimated $13 billion net worth, and habit of never taking a note in meetings - remains enigmatic. So we went looking for clues to his vision, goals, and thinking process.

Here's what we found.

This is an update of an article originally written by Drake Baer.