On the topic of bitachon, the Bnei Yissochor writes (Kislev, Maamar 3, Ois 24):
If one truly believes that every “natural” thing that occurs to him, even his business dealings and the like, is the result of Hashgacha Pratis, he will not think that his hishtadlus is the source of his success. Rather, he will know that the more hishtadlus he puts into Torah and mitzvos, the more success he will find in his hishtadlus in business, without the need for much effort and exertion. Such a person, won’t need to spend a lot of time working and doing business, because even though Hashem cloaks everything in the guise of “nature”, He will provide for him.
This is how it was with the eaters of the mann. It says about them (Bamidbor 11:8): “Shatu ha’am v’laktu. The people walked about and gathered it.” The Zohar Hakadosh writes that the word “shatu” indicates that the people did a “shtus” (something foolish), by engaging in excess hishtadlus to gather the mann. For tzadikim, however, the mann fell right by the doors of their tents, and was piled so high that they didn’t even need to bend down to pick it up.
The only reason people need to engage in a lot of efforts for parnassah is because they fail to recognize that Hashem is the only source of their livelihood. Since they think their hishtadlus is what brings them parnassah, they must engage in it.
After Moshiach comes, however, fully formed loaves of bread and vessels will sprout from the ground (Shabbos 30B). Everything will be prepared for us, without the need for hard work. This is stated in the verse (Zechariah 14:21): “There will no longer be a Canaani in the house of Hashem.” This means that there will be no more businessmen in the streets and marketplaces because “nature” will be abolished, everyone will recognize that everything comes from Hashem, and there will be no need for work or business.
