You only ever grow as a human being if you're outside your comfort zone.
Quotes from Eat and Run by Scott Jurek — Percy Cerutty
Attribution
Quotes and notes from Wikiquote: Percy Cerutty (page history), available under CC BY-SA 4.0.
Quotes and notes from Wikiquote: Percy Cerutty (page history), available under CC BY-SA 4.0.