I think it is a misconception that spirituality brings everlasting happiness or the spiritual people never feel pain.
Wise and enlightened ones also feel sadness. Pain and Sorrow still comes to them. May be temporarily, but they also feel the pain and get affected by their surroundings and circumstances.
Like Lord Rama crying when Sita ji was kidnapped; or Lord Krishna becoming angry in frustration when Arjuna was losing the war.
Guru Nanak cried in pain when Babar's armies were massacring the innocent and helpless people after conquering north India.
He questioned the Lord in a sad and painful tone:
"Eti maar payi kurlaane, Tain kee dard na Aaya?" or Guru Gobind Singh ji singing in loneliness: “Mitar pyaare nu haal mureedan da kehna”.
Jesus Christ cried on the cross asking:
“Why have you forsaken me O’ Lord?”
Recently we witnessed tears in Baba Hardev Singh ji’s eyes in a very tense emotional situation when his mother, Raj Mata ji passed away.
Feeling pain and sorrow or getting affected by the circumstances are natural human emotions. Everyone feels them.
But yet, Gyanis or enlightened ones are different. Unlike most people, the Gyana and the clarity of their mind helps them to see beyond the temporal emotionalism of the moment. They have better understanding and acceptance; they know when and how to let go the intellect and become the 'observer' rather than the 'actor' and go with the flow.
“Sukh Dukh is Sansaar me har praani ko hoye
Gyani kaate Gyana se, agyani kaate roye”