It is an attribute. The Real (al-Ḥaqq) does not change or transform. (Hujvīrī, 499)
Ḥuzn (sorrow) derives from the word ḥazan. This also means rugged (not smooth or even), difficult. A man's huzūnat refers to the difficulty of his character.
Ḥuzn is only applicable to something that has been lost. What is lost from the past does not return; only something similar may come. When a person remembers someone who has attained something similar to what has passed, this recollection causes ḥuzn in his qalb (the heart). Especially for the one who watches over his breaths, that (desired thing) means the difficulty of attaining it. Only those among the Sufis who are people of mushāhada (direct witnessing) can attain this. Moreover, in the acquisition of means, there is never the complete acquisition of the matter itself (having ample means does not mean total success in the matter). In this case, missing an opportunity becomes inevitable, and thus ḥuzn also becomes inevitable. This maqām (spiritual station) and the state that arises from it is not the result of presence, but rather the emergence of heedlessness. (Futūḥāt, II, 183)
Ḥuzn is to lament for the absent (that which is not present now) and to grieve for the impossible. It has been said: The ḥuzn of the common people arises from ifrāṭ (excess) regarding rights, while the ḥuzn of the elite (khawāṣṣ)...