That is pretty obvious. But believing you will succeed is still very different than believing you have a non-zero chance to succeed. If I remember correctly, M

That is pretty obvious. But believing you will succeed is still very different than believing you have a non-zero chance to succeed. If I remember correctly, Musk even had the mindset of "I will probably fail, but something good will come out of it, even if I fail". I think the details on this mindset matter on the "believe" part.