Taqlīd: Holding a belief only because someone handed it to you
Al-Ghazali found that everything he believed had come from his teachers, and it gave way the moment he pressed on it. Borrowed convictions feel solid until a confident stranger says the opposite, and then a person simply switches sides. Someone who has never tested what they carry ends up agreeing with whoever spoke last.
Whoever has not tasted does not know: secondhand words stay thin
Sufis repeat this line about knowledge a person has been through rather than heard about. A description of honey can be argued with, the taste of it cannot, and the same holds for anything lived. When belief has been carried through fear, loss, and long stretches of doubt, a clever argument can interest someone without moving them.
Khawāṭir: The thoughts that arrive on their own
Al-Ghazali gave close attention to the ideas that show up in a person unasked. A new teaching often lands with a rush of excitement that feels like proof, and that rush is most of its power. After a week, a person can usually tell where it has been pulling them, which the first hour never showed.
Beware the insight of the believer, for they see by the light of God: honesty sharpens the eye
A saying of the Prophet that Sufis come back to often. A heart kept honest with itself picks up on being worked early: the flattery, the hurry, the piece that keeps getting left out. Someone busy fooling themselves has no attention left over for spotting it in anyone else.
Tamkīn: Steadiness that stays put
Sufi teachers use this for the point where a person stops living at the mercy of their own weather. Early on, moods and new ideas move someone hard: one talk lifts them, one criticism sinks them, one book rearranges everything. Later that same person can hear all of it, take what is worth taking, and still be standing in the same place the next morning.