Did you know the disciple's had 0 faith or less than that of a mustered seed?do you agree?

I've been mulling over a theory that someone shared with me recently, and it goes something like this. The disciples, like us, did not perform the signs and wonders that Jesus told them they could because they did not accept the truth of who they were--children of God. It's a conundrum. It's almost as if by trying to have faith, we defeat ourselves, since it shouldn't require any effort for us to be who we are.