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While I am here, I want to maximize my time on this planet, you know.

Use plants to bring life.

Take good care of our fragile planet.

I have an enormous personal ambition. I want to shift the entire planet.

You stop planetary exploration, those people who do that extraordinary work are going to have to go do something else.

You can assume that the leaf you see let go of a branch and fall towards the ground has never been considered by any being but yourself. Catch it in your hand - or, even better, keep walking until one falls into your reach naturally - and it will have spent its whole time on the planet without ever touching the ground, only because of you.

You come to the planet with nothing and you leave with nothing, so you'd better do some good while you are here.

Everybody has busy lives, but you can tell people, 'Go outside and look at the night sky. We've been able to demonstrate that every star you see probably has a planet around it.'

I don't want to leave this planet until I achieve everything that I was put here to do.