My translation of the famous Gita phrase,
यदा यदा हि धर्मस्य ग्लानिर्भवति भारत । 
अभ्युत्थानमधर्मस्य तदात्मानं सृजाम्यहम् ॥४-७॥ 
परित्राणाय साधूनां विनाशाय च दुष्कृताम् । 
धर्मसंस्थापनार्थाय सम्भवामि युगे युगे ॥४-८॥
may not be the same as many others
Krishna says:
 whenever one veers far from truth,
 to elevate Dharma( the sattvic evolution)
the atma creates aham (I).
For protection of spirituality and annihilation of evil (thoughts)
I make possible over and over through time.