"Truth is, I'll never know all there is to know about you just as you will never know all there is to know about me. Humans are by nature too complicated to be understood fully. So, we can choose either to approach our fellow human beings with suspicion or to approach them with an open mind, a dash of optimism and a great deal of candour."

"It's always a combination of physics and poetry that I find inspiring. It's hard to wrap your head around things like the Hubble scope."

"No journalist has ever been in my house and no photographs have ever been taken of where I live. I don't parade my family out for display, which is the way it will stay."

"As long as you as an individual... can convince yourself that in order to move forward as best you can you have to be optimistic, you can be described as 'one of the faithful,' one of those people who can say, 'Well, look, something's going to happen! Let's just keep trying. Let's not give up."

"Trust men and they will be true to you treat them greatly and they will show themselves great."

"Never underestimate the power of the bonds of friendship are the true treasures of existence."

"It is a subtle truth that all philosophical inquiry begins with the humility to admit the limits of knowing — an essential principle for the reflective life."

"It is a profound truth that breathe deeply, anchor your attention in this breath, and let the storm pass."