Ibn al-Qayyim al-Jawziyyah said:
“What is surprising is that a person finds
it easy keeping away from things like consuming haraam, oppression, adultery,
theft, drinking alcohol and looking at the impermissible, but yet he finds it
difficult to guard his tongue!
It is such that you will see a man who is
viewed to be knowledgeable and is an ascetic worshipper but he speaks words that
bring the Wrath of Allaah, without giving them a second thought.