Perhaps that's due to us protecting our ego, as it seems that we can often let our ego get in the way of pushing an initiative, and it can be that sometimes that is one thing that will ultimately mean success or fail, or simply the distance things go.
So that was one piece of advice that had been given to me, that one must be willing to put themselves completely out there and do not let one's own ego get in the way.
Essentially putting ourselves out of our comfort zone and being 'shameless' for change - as what is the shame in standing up for what you believe in hey? :)
So think about what you believe in when you have a moment where you are feeling a bit shameful, but you know that doing something will help make things right, and be shameless! ;)