Ibn al-Qayyim رحمه الله: _"One of the signs of someone who truly knows Allāh is that they don't grieve over what they lose, nor do they become overly happy with what they gain. This is because they see everything as temporary and fading away, recognizing that in reality, they are just like shadows and illusions."_ [Madarij al-Salikin | 3/318]