krame bÄlya-paugaṇá¸a-kaiÅ›oratÄ-prÄpti
rÄsa-Ädi lÄ«lÄ kare, kaiÅ›ore nitya-sthiti
krame - gradually; bÄlya - childhood; paugaṇá¸a - boyhood; kaiÅ›oratÄ - youth; prÄpti - development; rÄsa - dancing with the gopÄ«s; Ädi - and others; lÄ«lÄ - pastimes; kare - performs; kaiÅ›ore - in His age of pre-youth; nitya-sthiti - eternally existing.
The comparison made here is very interesting. Kṛṣṇa does not grow like an ordinary human being, even though He exhibits His pastimes of childhood, boyhood and pre-youth. When He reaches the age of pre-youth, kaiÅ›ora, He does not grow any older. He simply remains in His kaiÅ›ora age. He is therefore described in the Brahma-saá¹hitÄ (5.33) as nava-yauvana:
advaitam acyutam anÄdim ananta-rÅ«pam
Ädyaá¹ purÄṇa-puruá¹£aá¹ nava-yauvanaá¹ ca
vedeá¹£u durlabham adurlabham Ätma-bhaktau
govindam Ädi-puruá¹£aá¹ tam ahaá¹ bhajÄmi
This nava-yauvana, or pre-youth, is the eternal transcendental form of Kṛṣṇa. Kṛṣṇa never grows older than nava-yauvana.