Complex sentence: Repeated efforts to help them failed, he wrote, until one day a particular client repeatedly cried and then felt better-after many attempts to stop him crying, Jackins relented and found that the client's condition and life improved.
Split into simpler sentences: Repeated efforts to help them failed, he wrote, until one day a particular client repeatedly cried and then felt better. After many attempts to stop him crying, Jackins had relented and found that the person's condition and life improved.