Emotions cannot be suppressed, but they can be controlled. The Qur'an provides us with the guidelines of how to moderate our emotions, especially negative emotions. Dr. Yasien Mohamed discusses his most recent paper on how to heal our emotions with the Qur'an.
You can read the paper, Perspectives on Islamic Psychology: al-Raghib al-Isfahani on the Healing of Emotions in the Qur'an, here.