Do things as soon as you can. If a decision needs to be made, make it. It gives you more time to change your mind.
Science that leads over the horizon depends on gathering the best minds and enabling them to do what the best minds naturally seek to do: pursue the most thrilling questions of the time.
I don't think we are here for anything. We're just products of evolution. You can say, "Gee, your life must be pretty bleak if you don't think there's a purpose." But I'm anticipating a good lunch.
The brain is the last and grandest biological frontier, the most complex thing we have yet discovered in our universe. It contains hundreds of billions of cells interlinked through trillions of connections. The brain boggles the mind.
If you accept that people are the products of evolution, then you have to have an open mind to the truth. Unfair discrimination exists whether we like it or not; I wouldn't have married a gum-chewing vegetarian.