When the guys come back in from the spacewalk, there really is a distinct smell of space; it's something I will never forget.

One of the things I do know is we know very little about our universe. Even though we think we know a lot, and we do know a lot more than we used to, we have a lot to learn about our universe.

I think someday, out in space, perhaps, some people might be able to grow some of their own food or hopefully on another planet.

Life as an astronaut in space is a very interesting one. There are things we all take for granted here on earth, like gravity, that can make things a bit challenging. One of the fun things about getting here is the zero gravity and floating around. But it also makes things very difficult.

We must not confuse religion with God, or technology with science. Religion stands in relationship to God as technology does in relation to science. Both the conduct of religion and the pursuit of technology are capable of leading mankind into evil; but both can prompt great good.

Today I still feel like the most illiterate person ever to have roamed the campuses of Wellesley and Harvard, where I later transferred. I remain intimidated by all the books I haven't read, but over the years I've come to realize that being a student is a lifelong adventure.

In India, we are forced to choose our specialisation very early, whereas in some other countries, this can be done much later in life. While the British have abandoned this approach, we in India seem to be struggling with the old British system of education.

Reading is exercise for our brains in the guise of pleasure. Books give us insight into other people, other cultures. They make us laugh. They make us think. If they are really good, they make us believe that we are better for having read them.