BG Chap 14 - Staying transcendental even in this body
Though the ātmā is situated in the body, by the power of distinguishing jīva from the guṇas, he overcomes the three modes, which give rise to the body and freed from birth, death and old age, he experiences the ātmā. Thus he attains an eternal life, because the ātmā is eternal. He can enjoy the happiness of spiritual life even in this body because, after leaving this body, he is certainly going to the spiritual sky. But even in this body he can enjoy spiritual happiness. In other words, devotional service in Kṛṣṇa consciousness is the sign of liberation from material entanglement. This will be explained later by Kṛṣṇa (18.54) that having attained the state of Brahman, surpassing the modes, the pure soul neither laments nor hankers, and attains prema bhakti.