Hakim al-Umma Mawlana Ashraf ‘Ali Thanawi (Allah have mercy on him) said,
‘For us the reality of Tasawwuf is only knowledge accompanied with actions .
The actions are limited to those that have been instructed by the Prophet (Allah bless him and give him peace) and are within the volitional means of the spiritual aspirant (salik).
Besides these all other things are superfulous. If they are bestowed and the Shaykh approves of them then they are a blessing and one should be thankful for them.
However, if they are held or taken away after being given then striving to achieve them or being extremely sad on their withdrawal is impermissible in the path. Moreover it is extremely harmful for one’s spirituality. This is irrespective of whatever that thing may have been.’
Basair e Hakim al-Ummat ra, page 56