'Old' in the Bible

Without becoming weak in faith he considered his own body, now as good as dead [for producing children] since he was about a hundred years old, and [he considered] the deadness of Sarah’s womb.

We know that our old self [our human nature without the Holy Spirit] was nailed to the cross with Him, in order that our body of sin might be done away with, so that we would no longer be slaves to sin.

But now we have been released from the Law and its penalty, having died [through Christ] to that by which we were held captive, so that we serve [God] in the newness of the Spirit and not in the oldness of the letter [of the Law].