A Pastor once told me: " You may have great gifting, you may have great calling, you may have great maturity and ability; but without great character, you will likely only become a great failure."
I think age, tenure of walk, and outward acts of obedience have far less weight than character does. The truly "great," men historically especially Christian; have all exhibited exceptionally solid and sincere character. Everyone grows older; but that doesn't mean they mature, grow wiser, or more defined as a man. Anyone can be like the Pharisee on the temple porch proclaiming their righteous deeds as proof of maturity and Christian 'manhood,' but that has no bearing on actual authenticity. Folks can profess that tenure within the kingdom is proof of Christian manhood...but one could be Christian for 50 years and never tithe, never provide for their family, never reflect true fruit, etc. In the end, it is character which defines and proves us within the Kingdom. We are to reflect the character of Christ; thus, as our character evolves to be more of an accurate reflection-only then are we truly becoming a "Christian Man."