Never complain and never explain.
The dog that trots about finds a bone.
Know or listen to those who know.
Without hard work, nothing grows but weeds.
If you think you can do it, you can.
Expect problems and eat them for breakfast.
Wherever you are - be all there.
Go for it now. The future is promised to no one.
The wise does at once what the fool does at last.
Be kind whenever possible. It is always possible.
I think space will be conquered through the mind rather than the clumsy medium of space travel.