Bhagavad Gita, Chapter 6, Verse 5

A man should uplift himself by his own self, so let him not weaken this self. For this self is the friend of oneself, and this self is the enemy of oneself.

Your mind can lift you up or drag you down. Which one it does depends on how you train it.

The responsibility is placed on you. No outside force gets the credit or the blame here, the mind's own direction, cultivated or neglected, decides which way it ends up working.