Don't think if someone causes us pain they hate us, but rather that they are helping us to purify ourselves. If we can think like this, we are real Yogis. If we understand this point and accept it, we'll never find fault with anybody who abuses, scolds or insults us. That is the highest sadhana. Handling things this way takes great courage.
Mental strength comes by accepting pain.
Then pain is no longer pain but joy because we have realized its benefits. All are searching for happiness. In the case of human beings you see hundreds of efforts of various forms. The common purpose behind all these efforts is the search for happiness. The goal is approached by many in different ways.