Al-Ghayb: The unseen
The Quran's name for the part of reality that eyes cannot reach. When everything visible is going badly, your eyes hand you a full report, and it reads like the whole story. The unseen names a second set of facts, ones the eyes were never built to pick up. Your situation stays exactly the same size, and it stops being the entire account.
Baṣīra: The heart's own eyesight
al-Ghazali speaks of an eye set in the heart. Outer eyes measure damage, size, and time left, and by that measure a hard stretch looks like pure loss. The heart's eye reads the same stretch and catches what is being built while something else wears down. One situation, two honest readings, and only one of them arrives through the eyes.
Yaqīn: Certainty
The tradition's word for knowing that has stopped wobbling. Looking toward what cannot be seen sounds thin, since nothing there can be held, counted, or shown to anyone else. Certainty is the point where the unseen outweighs the bad news in front of you, with no proof arriving to settle it. A person there keeps going without needing the good outcome to arrive on schedule.
Everything perishes except His face: one thing outlasts the rest
A line from the Quran that Sufis repeat constantly, sorting all things by how long they last. Health, money, reputation, and the body itself sit in the pile that ends, and no amount of care moves them out. Knowing that in advance takes some of the shock out of losing them, since they were on loan the whole time. One thing is still standing when the rest goes, and it never had an expiry date.
Zuhd: A loose hold on passing things
Living among things without leaning your whole weight on them. Nobody looks past what they are clutching, and the fear of losing something keeps the eyes locked on it. A looser hold frees attention up, so a person can enjoy what is here and stay steady when it goes. The things stay in the hands; they stop being what holds the person up.