Maybe I’m misunderstanding the quote, but this seems to wither if you have something to protect.
Only if you’re not the one with the responsibility to do something to protect it. I don’t know the context of the quote, other than apparently being from an interview (with the actor, not any character he has played), but I read it as being about your own efforts to accomplish something. In such matters, you are the first person on your team, and you won’t get any others on board by telling them you’re not sure this is a good idea. Once you’ve made the decision that you are going to go for it, you have to then go for it, not sit around wondering if it’s the right decision. If you’re not acting on a decision, you didn’t make it.
Only if you’re not the one with the responsibility to do something to protect it. I don’t know the context of the quote, other than apparently being from an interview (with the actor, not any character he has played), but I read it as being about your own efforts to accomplish something. In such matters, you are the first person on your team, and you won’t get any others on board by telling them you’re not sure this is a good idea. Once you’ve made the decision that you are going to go for it, you have to then go for it, not sit around wondering if it’s the right decision. If you’re not acting on a decision, you didn’t make it.