Children and the sin nature

I just came across a quote that does a great job describing the sin nature and how we are born sinners:

Every baby starts life as a little savage He is completely selfish and self-centered. He wants what he wants when he wants it--his bottle, his mother's attention, his playmate's toy, his uncle's watch. Deny him these wants, and he seethes with rage and aggressiveness, which would be murderous, were he not so helpless. he is dirty. He has no morals, no knowledge, no skills. this means that all children, no just certain children, are born delinquent. If permitted to continue in the self-centered world of his infancy, given free reign to his impulsive actions to satisfy his wants, every child would grow up a criminal, the their, a killer, a rapist (attributed to The Minnesota Crime Commission by Haddon Robinson in Biblical Preaching. Grand Rapids : Baker, 1980, 145).