"My handwriting did not change, though the hand was weightless. But it was necessary to hold the writing-block as otherwise it would float away from the hands…"

"I am full of joy and happiness. It's a great feeling to be in space."

"When I orbited the Earth in a spaceship, I saw for the first time how beautiful our planet is. Mankind, let us preserve and increase this beauty, and not destroy it!"

"To be the first to enter the cosmos, to engage, single-handed, in an unprecedented duel with nature-could one dream of anything more?"

"The main thing about space is that it is not dark. It is light, just not like on Earth."