Taqwā: Careful awareness that keeps a person from doing wrong
The word points to alertness, the state you are in when driving on ice. Anyone whose decisions settle things for other people can go numb once the work turns routine. Taqwā puts a small pause before each choice, the moment you ask whether this is straight, and most harm gets stopped there.
If you do not see Him, He sees you: nothing is done unobserved
The line comes from the Prophet, answering a question about what it means to do things well. Much of the harm one person does another happens where nobody else is looking: the quiet phone call, the paper nobody double-checks. Holding in mind that the room is never empty changes what a person is willing to do in it.
ʿAdl: Justice, giving each their due
Muslims call God al-ʿAdl, the Just, and al-Ghazali counts it among the names a person is meant to take on. Anyone deciding between people feels the pull of the louder voice, the old friend, the one who can hurt them later. A standard fixed in God's own character gives them a mark to measure by while those pulls are working.
Ṭamaʿ: Craving what other people can give you
Sufi teachers name ṭamaʿ as the appetite that puts a person in someone else's pocket. Payment rarely arrives as cash; it arrives as a hope, a favor owed back, a good word to someone above you. Once you want something from a person, your reading of their case bends without your ever deciding to bend it.
Ikhlāṣ: Sincerity, doing a thing for God alone
Al-Ghazali gives a long section of the Revival to cleaning up why we act. Two people can make the same fair call, one because it is right, one because it looks good this week. The second holds only while it pays, and sincerity is what remains when the doing wins you nothing at all.