It is strange that a person may find it easy to protect himself from: eating Haraam, oppression and injustice, adultery, theft, drinking khamr (alcoholic drinks), and from unlawful looking, but it is hard for him to restrain the movement of his tongue. How often do we see people who are very cautious about falling into shameful deeds or injustice, but their tongue lashes against the living and the dead and they don't mind it?

Men mixing with women is like fire mixing with wood.

A believer to another believer is like two hands, one washes the other (correcting each other).

A calamity that makes you turn to Allah is better for you then a blessing which makes you forget the remembrance of Allah

When people help one another in sin and transgression, they finish by hating each other.

Make tawba not just for sins you've committed, but also for obligations you haven't fulfilled.

The disease that knowledge brings is arrogance, and the disease that worship brings is showing off