Understand that for every rule which I have mentioned from the Quran, the Devil has one to match it, which he puts beside the proper rule to cause error.
Al-GhazaliPeople count with self-satisfaction the number of times they have recited the name of God on their prayer beads, but they keep no beads for reckoning the number of idle words they speak.
Al-GhazaliO youth.......be assured that knowledge alone does not strengthen the hand......Though a man read a hundred thousand scientific questions and understood them or learned them, but did not work with them---They do not benefit him except by working.....Knowledge is the tree, and working is its fruit; and though you studied a hundred years and assembled a thousand books, you would not be prepared for the mercy of Allah the Exalted except by working.
Al-GhazaliIf you see Allah, Mighty and Magnificent, holding back this world from you, frequently trying you with adversity and tribulation, know that you hold a great status with Him. Know that He is dealing with you as He does with His Awliyaโ and chosen elite, and is watching over you.
Al-GhazaliWhen you have a bad suspicion about a Muslim in your heart, you should increase your consideration toward him and make dua for him. This way you will infuriate Satan and will be able to drive him away. Because of this, Satan will be reluctant to put evil thoughts into your heart, afraid that you would increase your consideration towards your brother and will make dua for him again.
Al-Ghazali