There are times that Hashem places us in a position where bitachon is the only solution.
There is a saying, עין כהרף 'ה תשועת, Hashem's salvation can come in the blink of an eye. We can also explain that Hashem saves us עין בהרף when we stop looking around for salvation from others other than Hashem. When we place our trust solely in Him, Hashem helps us.
It states (Tehillim 9:19) ,אביון ישכח לנצח לא כי לעד תאבד עניים תקוות. The pasuk seems to contradict itself. It seems to be saying, לא כי אביון ישכח לנצח, "For the needy shall not be forgotten forever," which means there is hope for them. And then the pasuk states לעד תאבד עניים תקוות, "the hopes of the poor shall be lost to eternity." So, do the poor have hope, or do they not?
We can answer that the poor person can always have hope. The pasuk is saying that the particular matter he trusted upon won't transpire, and Hashem will help him another way. For example, perhaps the poor man thought that a particular wealthy person whom he knows would give him money, but תאבד עניים תקוות, his hopes were dashed. And then Hashem helps him in another way.
