Answer:

For the poet, childhood seems to be a thing of past. He ponders over the questions as to ‘when’ and ‘where’ did his childhood go. He tries to identify the specific moment, time or day when he lost his childhood and stepped into adulthood.

He indicates that childhood is naive and does not understand hypocrisy. At this stage of life, rational thinking and individuality are yet to be developed. The poet feels that his childhood is gone forever and can only be found in the innocent face of an infant.