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In the elementary equations of the world, the arrow of time appears only where there is heat. The link between time and heat is... fundamental: every time a difference is manifested between the past and the future, heat is involved.

— Carlo Rovelli The Order of Time (2018)

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More quotes by Carlo Rovelli

An overly pragmatic attitude is not productive in the long run.

Quantum gravity (2004)

Children grow up and discover that the world is not as it seemed within the four walls of their homes. Humankind as a whole does the same.

The Order of Time (2018)

The landscape is magic, the trip is far from being over.

Quantum gravity (2004)

The World is Made of Events, not Things.

The Order of Time (2018)

In his youth Albert Einstein spent a year loafing aim- lessly. You don’t get anywhere by not ‘wasting’ time – something, unfortunately, which the parents of teenagers tend frequently to forget.

Seven Brief Lectures on Physics (2014)

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Quote text and notes from Wikiquote: Carlo Rovelli (page history), available under CC BY-SA 4.0. Source quality and labels are our own summary of what Wikiquote records.