Chris Hadfield said this quote

Life off Earth is in two important respects not at all unworldly: you can choose to focus on the surprises and pleasures, or the frustrations. And you can choose to appreciate the smallest scraps of experience, the everyday moments, or to value only the grandest, most stirring ones.

~ Chris Hadfield

It's puzzling to me that so many self-help gurus urge people to visualize victory, and stop there. Some even insist that if you wish for good things long enough and hard enough, you'll get them - and, conversely, that if you focus on the negative, you actually invite bad things to happen. Why make yourself miserable worrying? Why waste time getting ready for disasters that may never happen? Anticipating problems and figuring out how to solve them is actually the opposite of worrying: it's productive. Likewise, coming up with a plan of action isn't a waste of time if it gives you peace of mind. While it's true that you may wind up getting ready for something that never happens, if the stages are at all high, it's worth it.

~ Chris Hadfield

It's never either-or, never enjoyment versus advancement, so long as you conceive of advancement in terms of learning rather than climbing to the next rung of the professional ladder. You are getting ahead if you learn, even if you wind up staying on the same rung.

~ Chris Hadfield

I wasn't lonely. Loneliness, I think, has very little to do with location. It's a state of mind. In the centre of every city are some of the loneliest people in the world. If anything, because our whole planet was just outside the window, I felt even more aware of and connected to the seven billion other people who call it home.

~ Chris Hadfield