jñatvÄjñÄtvÄ ca karmÄṇi
jano 'yam anutiá¹£á¹hati
viduá¹£aḥ karma-siddhiḥ syÄd
yathÄ nÄviduá¹£o bhavet
jñÄtvÄ - understanding; ajñÄtvÄ - not understanding; ca - also; karmÄṇi - activities; janaḥ - the common people; ayam - these; anutiá¹£á¹hati - perform; viduá¹£aḥ - for one who is wise; karma-siddhiḥ - achievement of the intended goal of activity; syÄt - arises; yathÄ - as; na - not; aviduá¹£aḥ - for one who is foolish; bhavet - occurs.
The Lord here informs His father that people should perform a particular ceremony or activity only after thoroughly understanding it through discussion with friends. We should not be blind followers of tradition. If a person doesn’t even know what he’s doing, how can he be successful in his work? This, essentially, is the Lord’s argument in this verse. Since Śrī Kṛṣṇa, as the young child of Nanda, would naturally be expected to show enthusiasm for His father’s religious activities, it was the father’s duty to give the son a thorough explanation of the ceremony.