What's A Man? In the Bible it teaches that everyone will fall short of sin. This is based upon the fact that there are so many ways to Sin, and no one's perfect. The Bible also gives an alternative between Sin and Sinless.
That one must acknowledge his Sin and work towards not committing that Sin again. Given this, A Man is a Boy who strives everyday to become that Man. There's dozens of characteristics that upholds the Man role, too many to fulfill.
That one will always fall short of being that Man, but when bringing The Bible alternative into context here, one must acknowledge his shortcoming and strive daily to fulfill that lack thereof.
That is a True Man! You can only be A Boy or Man (Sinner or Sinless), so A Boy who strives everyday to become that Man, to better himself, is A MAN.