Ian Mcewan said this quote

For children, childhood is timeless. It is always the present. Everything is in the present tense. Of course, they have memories. Of course, time shifts a little for them and Christmas comes round in the end. But they don’t feel it. Today is what they feel, and when they say ‘When I grow up,’ there is always an edge of disbelief—how could they ever be other than what they are?