I think it's always great to document quotes that inspire you, especially for moments when you're down.
Here's a collection of my favorites.
On opportunities:
When one door closes, others will open. Opportunities come when you're available to receive them. If you remain stuck, you'll never see them.
On courage:
It is not the critic who counts; not the man who points out how the strong man stumbles, or where the doer of deeds could have done them better. The credit belongs to the man who is actually in the arena, whose face is marred by dust and sweat and blood; who strives valiantly; who errs, who comes short again and again, because there is no effort without error and shortcoming; but who does actually strive to do the deeds; who knows great enthusiasms, the great devotions; who spends himself in a worthy cause; who at the best knows in the end the triumph of high achievement, and who at the worst, if he fails, at least fails while daring greatly, so that his place shall never be with those cold and timid souls who neither know victory nor defeat.
― Theodore Roosevelt
The bravest are surely those who have the clearest vision of what is before them, glory and danger alike, and yet notwithstanding, go out to meet it.
― Thucydides, Greek Historian 460 BC - 395 BC
On journeys and destinations:
Often we find our own destiny on the same roads that we have been avoiding.
― Jean de La Fontaine
Jean de La Fontaine, Sun Sep 29 2019.
https://www.goodreads.com/quotes/92136-often-we-find-our-own-destiny-on-the-same-roads.
Theodore Roosevelt, Sun Sep 29 2019.
https://www.goodreads.com/quotes/7-it-is-not-the-critic-who-counts-not-the-man.