What would you say about being overly optimistic or overly pessimistic about the ways of approaching the path?

As everyone is entitled to their own opinion to a question of this nature, let me first say this. Now I recognize that they’re both forms of conceit. If we learn the proper use of conceit: the confidence that, yes, you can do this; other people can do it, it’s something human beings have done—you’re a human being, you can do it too. Once you’ve got that amount of conviction, then it is time to drop the “you,” drop the “me,” the “I,” and then set to work. That right there makes it a lot easier. And this way you become your own best friend.