Shaykhul-Islam Ibn Taymiyyah (may Allah have mercy upon him) stated:

When you see the servant talking about the people when they have harmed him whilst he  (the servant) doesn’t return the blame back to himself and seek forgiveness (from Allah), then know that his calamity is a true calamity. However when he repents, seeks forgiveness and says “This is due to my sins,” then this matter (of being harmed by the people) will become a blessing for him.

Source: Jaam’i al-Masaa-il, 1/169

Translated by Abu Yusuf Khaleefah
28th of Rabee’ ath-Thaani, 1436 H (02-18-2015)
Masjid Nur Allah, Queens, NYC

Original Arabic

قال شيخ الإسلام ابن تيمية -رحمه الله

…وإذا رأيت العبد يقع في الناس إذا آذوه ، ولا يرجع إلى نفسه باللوم والاستغفار، فاعلم أن مصيبته مصيبة حقيقية، وإذا تاب واستغفر وقال: هذا بذنوبي، صارت في حقه نعمة

(جامع المسائل ١٦٩/١)