Lyric discussion by Polka.dot 

Cover art for Fear lyrics by OneRepublic

I agree but think that it implies he is struggling to feel safe now ('wish I didn't know the meaning of...[fear]') and can't rest and doesn't feel like there's anyone looking out for him - he recognises that even though children feel fearless there is usually someone watching/caring for them.

The piano in this song is really captivating, wish there were more verses as I really like the beginning. The rest of the song seems almost dreamlike at times, which I guess kind of captures that childhood memory like quality that relates to the song.