#159 The Right Double Standard
It is said in the name of Rabbi Yitzchok Blauser: "Trust in the Almighty is a very precious attribute. The Talmud (Sotah 48b) tells us that if a person has enough bread to eat today, he is lacking a degree of trust if he worries about what he will eat tomorrow.
Bear in mind, however, that this applies only to a person working on his own attributes. When it comes to other people, we must be concerned about what they will eat tomorrow... and for many days to come.
(see Ohr Yechezkail, Midos, p.22; Rabbi Pliskin's "Consulting the Wise")