God understands human failings and becomes man to do good to humanity: यदा यदा हि धर्मस्य ग्लानिर्भवति भारत। अभ्युत्थानमधर्मस्य तदात्मानं सृजाम्यहम्॥ परित्राणाय साधूनां विनाशाय च दुष्कृताम्। धर्मसंस्थापनार्थाय सम्भवामि युगे युगे॥ — "Whenever virtue subsides and wickedness prevails, I manifest Myself. To establish virtue, to destroy evil, to save the good I come from Yuga (age) to Yuga."