Most of the best quotes are near identical to those from the book ( https://sccl.bibliocommons.com/item/show/1439133103_the_martian#quotation ) except the film added more earthly material at the end such as Watney addressed the students part 1 of 2:
Welcome to the Astronaut Candidate Program. Now pay attention, because this could save your life.
Trust me, I know what I'm talking about. Let me get a few things out of the way, right off the bat. Yes, I did in fact survive on a deserted planet by farming in my own shit. Yes, it's actually worse than it sounds. So let's not talk about that ever again.