This visible world is a trace of that invisible one and the former follows the latter like a shadow.
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-GhazaliThe soul should take care of the body, just as the pilgrim on his way to Makkah takes care of his camel; but if the pilgrim spends his whole time in feeding and adorning his camel, the caravan will leave him behind, and he will perish in the desert.
Al-Ghazali