Lord Krishna used to worship Devi (Mother Divine). This is mentioned in the Durga Saptashati(a series of 700 verses in praise of the Mother Divine, from the Markandeya Purana).
‘Roopam Dehi Jayam Dehi Yasho Dehi Dvisho Jahi’. These verses come from the Argala Stotram in the Durga Saptashati and become a kavach (armour or shield) for one who recites them.
It is said, ‘Krishnena Samstutay Devee Shashvad Bhaktyaa tathaambikay, Roopam Dehi Jayam Dehi Yasho Dehi Dvisho Jahi.’
Meaning, ‘Oh Devi (Mother Divine) who is worshipped with eternal devotion by Lord Krishna, bless us with beauty (Roopam), victory (Jayam), glory (Yasham) and destroy all craving and ignorance (Dvisho) in us.’
If you see, it is actually the Devi who rescued Lord Krishna. Devi was also born on the day of Ashtami, to Yashoda. And on that very same day was brought to Mathura. Kansa tried to get hold of her and kill her but she escaped from his hands.
Here, Kansa symbolises Ahankaar (ego), Lord Krishna symbolises Ananda (bliss) and the Devior Durga symbolises Aadhyashakti (primordial energy within us, or Consciousness).
Ego cannot catch hold of Consciousness or the primordial energy (Devi), nor can it catch hold of Ananda (bliss, that is Krishna).
So the Divine Consciousness (Devi) then made a prophecy that the One who is destined to destroy the Ego (Kansa) is Bliss (Krishna) and he has already been born.
When life becomes full of Ananda (bliss), then ego vanishes. When one is feeling blissful there is no ego. But as long as ego remains, a person keeps on suffering and is miserable. They become sad due to something or another, or go on blaming someone or the other. Even then ego cannot destroy Consciousness, because Consciousness is eternal.
Nothing can destroy or diminish the power of Consciousness. It is constant and eternal. Those who know physics would know this very well that energy can never be created or destroyed. So also, Consciousness can never be created nor destroyed. Any efforts to create or destroy that (primordial) energy will only fail.