"Founding a company is hard. Most of it isn't smooth. You'll have to make very hard decisions. You have to fire a few people. Therefore, if you don't believe in your mission, giving up is easy. The majority of founders give up. But the best founders don't give up."
American technology entrepreneur who co-founded Facebook and later led Meta Platforms as chairman and chief executive. He launched Facebook while studying at Harvard in 2004. He is also a co-founder of the Chan Zuckerberg Initiative.