kaiśora-vayase - in the adolescent age; kāma - amorous love; jagat-sakala - the entire universe; rāsa-ādi - such as the rāsa dance; līlāya - by pastimes; tina - three; karila - made; sa-phala - successful.

In His youth Lord Kṛṣṇa made all three of His ages, and the entire universe, successful by His pastimes of amorous love like the rāsa dance.