Amāna: A trust placed in someone's hands
Amāna covers whatever gets left in a person's care. Trust that wide feels like freedom at first and starts to weigh later, because nobody is checking anymore. A refusal in that spot rests on a line drawn well before the moment came, where access to what belongs to someone else never quietly turned into ownership.
Shukr: Gratitude shown in how you use what you were given
Al-Ghazali describes gratitude as using a gift the way its giver meant it to be used. Kindness received leaves a quiet debt, and the debt gets paid in how the gift is handled, not in thank-yous. Someone carrying that sense of debt finds one option closed off completely: turning a person's own generosity into the thing that wrecks them.
Nafs al-ammāra: The self that keeps ordering you toward what it wants
The Quran gives this name to the part of a person that pushes toward wrong. Pressure from outside is hard enough, and the harder one comes from inside, since it does not argue, it just repeats, and it grows loudest when nothing would ever be found out. Putting a name to that push changes how it lands, because a person stops mistaking a strong urge for their own considered choice.
Worship God as though you see Him, and if you do not see Him, He sees you: no moment goes unwitnessed
The Prophet gave this answer when asked what excellence in faith means. Wrongdoing usually needs privacy to feel possible, and this takes the privacy away, since the count of witnesses never drops to zero. Someone living inside that sense acts the same alone as in company, because the feeling of being seen never switches off.
Ḥayā': The shyness before God that stops a hand
The Prophet counted this shyness as part of faith itself. Shame in front of people fades the second they leave the room; this kind does not, because the one it answers to never leaves. A person feels it as plain reluctance, the sense that certain things are simply not done in God's sight, and the feeling arrives faster than any argument for or against.