Are Infants Really Born Sinless?

[Jacob's Ladder]

Originally Posted by Praxeas

Right. Babies are also born with a human nature but that does not mean at 6 months they know as much as a 20 year old does..they are born with the ability to learn

The ability to learn? If humanity is born sinless and has the ability to learn, why aren't there some who have remained in the state of sinless? I mean, everyone seems to have the "ability" to learn sin, yet nobody has the "ability" to learn how to remain sinless? It just seems if we're born in a sinless state, we ought to be able to remain in that sinless state.