This song is a message, a thanks giving message, to one or many who have supported wrabel.
And a message to the listeners that " one just have to believe in self and people starts supporting, impossible can be achieved "

Ten feet tall is used to show the level of achievement he have reached i,e. way beyond what he thought was possible. This, achieving impossible, was not a path traveled alone, he struggled through it but there was someone to help him when he was almost about to give up.
Someone to remind him of the reason he was doing it for.
He is thanking all those who supported him at times when everyone abandoned him.

A hard path gives failure, failure gives disappointments, disappointment tries to break oneself
if you still survive you will be .....ten feet tall.... :)