Source: BBC

There’s a thing about being alone and there’s a thing about being lonely, and they’re two different things. I was alone but I was not lonely. My background was as a fighter pilot in the airforce, then as a test pilot – and that was mostly in fighter airplanes – so I was very used to being by myself. I thoroughly enjoyed it. I didn’t have to talk to Dave and Jim any more, except once they came around [when the orbiting command module was above the landing site) and I said “hi”. On the backside of the Moon, I didn’t even have to talk to Houston and that was the best part of the flight.

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