I found some peace of mind

I am a man of six feet tall
just looking for some answers
In a world that answers none of them at all
I'll say : Hi but not reply
To the letters that you write
Because I found some peace of mind

Cause I'm only as tall as my heart will let me be
And I'm only as small as the world will make me seem
When the going gets rough and I feel like I may fall
I'll look on the brightside