When 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-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-GhazaliEach of your breaths is a priceless jewel, since each of them is irreplaceable and once gone, can never be retrieved.
Al-Ghazali