Bhagavad Gita 13.19

इति क्षेत्रं तथा ज्ञानं ज्ञेयं चोक्तं समासत्: |
मदभक्त एतद्विजाय मद्भावयोपपद्यते

Translation

I have thus revealed to you the nature of the field, the meaning of knowledge, and the object of knowledge. Only My devotees can understand this in reality, and by doing so, they attain My divine nature.