Best person is immature behavior when reaching the appropriate age to learn, but learning did not or do not like to grow mature and self-reliant, but also, and what decisions do not.
The immature person is age appropriate behaviors when learning not only to learn or do not, as adults, are still not self-sufficient and do not decide anything.
The immature person's behavior at the age appropriate learning but not or cannot return learn such as when grown up but still do not, and can't make decisions.