This card has a pretty insane combo with Fickle Fortune.
The idea is that you have at least 1 copy of Fickle Fortune in your discard, and 2 copies of Resourceful in hand. Then, wait until the "Witching Hour" (the turn when there's one doom left on the agenda threshold).
Action 1: Pass a skill test, committing both Resourcefuls to it. Have each Resourceful pull Fickle Fortune out of your discard, healing your entire team for 3 damage and 3 horror.
Action 2: Play True Survivor, returning the Resourcefuls again
Action 3: Same as action 1.
You've just healed 12 damage and 12 horror, for a total of 24 Unexpected Courages. And not just for you - for every investigator with a copy of Soul sanctification. So in a 4-player game, this combo would generate 96 Unexpected Courages for your team. Which should be more than enough for your team to pass every skill test for the rest of the scenario.
If you had more than 3 actions, or other ways to recur them even more during this turn, you can probably get the number even higher.
After you pull off the combo, you can just do it again on a later turn, but select the second option, to cash in your Fickle Fortunes for entire extra rounds. Considering your entire team will be fully healed at that point, the direct damage and horror isn't much of a downside.