We being born and shapen in iniquity have inherited through our humanity -Adam-, these fears inherently present in our natures, which we must put to death, and overcome if we are to be truly redeemed. It is part of the purge, washing with the water of the word, ever-increasing faith, that has to occur in the regenerated believer. It is unbelief, faithlessness, and doubt that will cause our exclusion from the Kingdom.