balam balavatam caham
kamo ’smi bharatarsabha
I am the strength of the strong, devoid of passion and desire. I am sex life which is not contrary to religious principles, O lord of the Bharatas [Arjuna].
Commentary by Srila Prabhupada
The strong man’s strength should be applied to protect the weak, not for personal aggression. Similarly, sex life, according to religious principles (dharma), should be for the propagation of children, not otherwise. The responsibility of parents is then to make their offspring Krishna conscious.
Commentary by Sri Visvanatha Cakravarti Thakur
I am the strength of the strong, not displayed out of anger or used with the desire to maintain to ones own lifestyle. 1 am lust not contrary to dharma, directed towards one’s wife only for the production of children.