O You Who Believe

While reading the tafsir/explanation of Surah Al-Ma'idah in Tafsir ibn Kathir, I came across this.
"Ibn Abi Hatim recorded that a man came to `Abdullah bin Mas`ud and said to him, "Advise me.'' He said, "When you hear Allah's statement,

[يَـأَيُّهَا الَّذِينَ ءَامَنُواْ]

(O you who believe!) then pay full attention, for it is a righteous matter that He is ordaining or an evil thing that He is forbidding.''"
So the reminder for today....pay attention when Allah says, "O You Who Believe".