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.

A man of bad character punishes his own soul.

Knowledge without action is wastefulness and action without knowledge is foolishness.

Half of disbelief in Allah in the world is caused by people who make religion look ugly due to their bad conduct and ignorance

There are two kinds of Riya - Showing off-Ostentation ie pure ostentation and adulterated ostention. In pure ostentation "Riya" a man does a good deed only for worldly benefit. In Adulterated ostentation, a man does a good deed with the intention of reaping the benefits of the world as well as of the Hereafter.

He who does not arrive at the Intuition of these Truths by means of Ecstasy knows only the name of Inspiration.

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.