Do believers grieve over events?

Believers do not grieve over events, because they know that Allah will try them with all manner of circumstances. They put their trust in Allah and maintain their steadfastness. They remember that Allah creates everything with wisdom. An example is given in the Qur’an as follows:

If you do not help him, Allah did help him when the disbelievers drove him out and there were two of them in the Cave. He said to his companion, “Do not be despondent, Allah is with us.” … (Surat at-Tawba, 40)

As stated in the verse, our Prophet (may Allah bless him and grant him peace) advises his companion, even in the very midst of hardship, not to be despondent. Since believers have an excellent model in the messenger, they behave accordingly in difficult situations. Among the most important reasons why believers never despair is that they know that every incident Allah brings about will ultimately turn out to be good for them. Allah has promised believers a good life in this world. During this good life, believers hope Allah will place them in the eternal Hereafter in an outstandingly splendid abode, which is much more beautiful than this world and where Allah’s blessings never diminish. This is certainly the best news one can ever receive and is the greatest source of joy. Therefore believers never become despondent. Allah gives believers the good news as follows:

Indeed, those who have said, “Our Lord is Allah”, and then remained on a right course—the angels descend upon them [saying]: “Do not fear and do not grieve but rejoice in the Garden [i.e., Paradise] you have been promised. We are your protectors in the life of this world and the Hereafter. You will have there all that your selves could wish for. You will have there everything you demand. (Surah Fussilat, 30-31)

Do believers grieve over events?