There's a concept in psychology called naïve realism. We think we see the world perfectly and assume that everyone sees it the way we do. If they don't? if they disagree? Our assumption is that they are wrong, and that they are misinformed. It's a natural inclination we all have which stops us putting ourselves in the other's shoes.

To rephrase John F. Kennedy, we are choosing to go to the Moon, not because it's easy, but because it's a great business!

I just hope that those who become influencers make smart choices; it's the kind of attention that comes quickly and is very hard to maintain. The top 10 YouTubers 10 years ago are not the top 10 YouTubers now. There are a few people that remain, and who have maintained longevity, but for the most part, influencer culture is extremely short lived.

Think about how that feels when you're told that for this essential skill that is part of the astronaut job, you're not needed. It's as if they were saying, 'You don't bring anything essential and we won't miss you.' That encouragement pushed me to show up to spacewalking meetings I wasn't initially invited to.

In business, you can drown in opportunity.

You can have many great actors but you have very few who really become movie stars. It is that indefinable quality of someone who becomes iconic that people want to come and watch regardless of the type of film they're in.

All you have to do is walk through an airport, for example, and notice that it is very difficult to navigate through it. You will encounter humans (almost statue like) who are glued – looking at their mobile phones, unaware of what is happening around them, because they are addicted to their technology. That is by design that people are addicted to technology.

After each strike the drone would be updated with information about the actual destruction caused. If it did more damage than expected, then it could use this information to restrict its choice of weapon in future engagements.

By our nature, we are all self-absorbed, irrational, short-sighted. You have to have some humility in life before you can begin to understand yourself, and before you can begin to change yourself, the world, or other people.

I often tell my students to recognize the implicit messages our clothing conveys about our mood, social status, and more. Soon, our entrance into a room will announce our presence not just visually or audibly, but also electromagnetically. Our interactions with others will encompass sight, sound, and this electromagnetic identity.

The very idea that – say – Make America Great Again – should be our guiding creed captures almost all the counter-enlightenment themes. It idealises the greatness of a nation as the ultimate good, as opposed to making all people healthier, safer, happier, richer and better educated. Rather than looking ahead to the progress that can be made, it looks back to a hypothetical golden-age to which we must return.

LGBT+ identity came into existence as a defence mechanism against those who were attacking us. We were being targeted because of our sexual behavior and our love. We had to defend ourselves – that is why we claimed, and asserted our LGBT+ identity.