I hate to sound like the I Ching or something, but it's 200% true that if you follow that part of yourself that is small, you will get small results. If you follow that part of yourself that is big, correct, principled, and more concerned with the greater good in the long run instead of your own petty day-to-day concerns and wants and desires, then everything opens up to you.
That's more like the true meaning of faith: It's not that you put your hopes in some God up there who's gonna save you just because, or even some "hero" down here who will do the same for you. Instead, you work to become the person that will be capable of saving himself and others. You work to help and "save" others, and thereby save yourself - but not in any hard physical 3d way.
That "faith" is the polar opposite of our iPhone selfie me-me-me world, where all we can think about is how I will survive, what about MY oh-so-important presence in the world, how can I survive, I don't want to suffer...
It's wise to prepare for possible futures, but it's even wiser to never need those preparations because you have done and continue to do the hard work of purging yourself of all that is small and petty as you closely and regularly observe reality and adjust your course.
None of that means that you will never die, or never go hungry, or never suffer in any other way. It just means that you will be able to choose your suffering to some extent, and that in the end it won't matter anyway because you will be able to say that you did all that you could to contribute to something better then yourself.
And then you won't be optimistic or pessimistic about the future; you'll just be there, surfing that wave, taking what comes, and so on. When you feel pessimistic, others in your network will remind you of the other side of the coin. When you are optimistic, others will balance that out.
In the end, our best friend ever is "educated uncertainty" because then we remain open to any and all possibilities. As I'm fond of reminding people, there is a reason the C's said, "Learn to think in unlimited terms."