Why do you resent the pain, when it is the Doctor who prescribed it? Like the prick of an injection needle, it is only meant to cure. Can pain be considered a loss, when what you gain is something so invaluable? The companionship of Allah, His Love, His Reward, His Forgiveness?
Abu Hurairah reported: The Messenger of Allah (peace and blessings be upon him) said, “Verily, Allah, the Exalted and Glorious, will say on the Day of Resurrection: ‘O son of Adam, I was ill but you did not visit Me.’ He would say: ‘O my Lord, how could I visit you and You are the Lord of the worlds?’ Thereupon He would say: ‘Did you not know that such and such a slave of Mine was ill but you did not visit him? Did you not realise that if you had visited him, you would have found Me with him?“‘ (Sahih Muslim)
Mahmud ibn Labeed reported: The Messenger of Allah (peace and blessings be upon him) said, “If Allah loves a people, then He afflicts them with trials. Whoever is patient has the reward of patience, and whoever is impatient has the fault of impatience.” (Musnad Ahmad)
Mus’ad ibn Sa’eed reported: The Messenger of Allah (peace and blessings be upon him) said, “The servant will continue to be tried until he is left walking upon the earth without any sin.” (Sunan at-Tirmidhi)
How amazing is the affair of the believer, for there is good for him in every matter.