Belief in allotted provision does not instruct a farmer to stop farming, a student to stop learning, or a sick person to refuse treatment. Lawful effort is often required, but unlawful shortcuts are not justified by anxiety about the future.
لَنْ negates the future and governs a subjunctive present verb; حَتَّى marks the limiting condition. The grammar reinforces the balance: the future is in Allah’s knowledge while responsible effort remains our duty.