If we want to have some devotion in God & want "Peace of Mind", then we need to change the direction of our "Mind"
This is beautifully described in Bhagavad Gita.
Bhagavad Gita Chapter 18
TEXT 65
SYNONYMS
mat-manah--thinking of Me; bhava--just become; mat-bhaktah--My devotee; mat-yaji--My worshiper; mam--unto Me; namaskuru--offer your obeisances; mam--unto Me; eva--certainly; esyasi--come;satyam--truly; te--to you; pratijane--I promise; priyah--dear; asi--you are; me--Mine.
TRANSLATION
Always think of Me and become My devotee. Worship Me and offer your homage unto Me. Thus you will come to Me without fail. I promise you this because you are My very dear friend.
So let's change the direction of our mind from the material world to Krishna. As per the above text, if we will do so, then we will reach
God and will enjoy the Bliss, Peace, Joy and Eternal Love with Him.