Are Muslims allowed to get angry? Can Muslims do whatever they wish in this life?

According to Western psychology, if you become mad about something, you should get it of the chest and let it out. But this is not the Islamic way. You will feel a lot better after you screamed at somebody or whatever, but the correct way is to control yourself.

Prophet Mohamed (ﷺ) said “don’t get angry.” ^[1]

You have to control your anger. Control the anger and bear the suffering of what people put you through. This is not a pleasant thing to do but it is the way to Paradise. For us to become better Muslims, to become the Muslims who earn Paradise, we have to deal with this reality. We have to have Sabr, patience. Prophet Mohamed (ﷺ) said reported by Maimoonah, “This world is a prison for the believer and a paradise for the disbeliever”^[2].

This is the full concept. It is a prison for believers because they  cannot let their desires to go wild and to do whatever they feel like doing. They have to control their desires. It is prison which they set for themselves. Whereas the disbelievers, do anything they feel like doing. That is paradise. Allah describes paradise for us saying “Enter paradise wherever you wish”.

References:

^[1] Jami` at-Tirmidhi 2020 [In-book reference: Book 27, Hadith 126]

^[2] Jami` at-Tirmidhi 2324 [in book reference: Book 36, Hadith 21]