Spiritual zeal is not the same as youthful vigor; spiritual zeal
propagates the Kingdom of Heaven, but youthful vigor only propagates
the human species.
Spiritual zeal is born of the love of God; it does not and will not
diminish with age, instead it will continue to grow stronger.
Youthful vigor is born of the lust of the flesh i.e. personal
ambitions and sexual desires and will only diminish with age.
Holy men of the ancient times did not write what we now call holy
scriptures until they were exceedingly old men.
John, the Apostle, wrote his Gospel, the Book of the Revelations and
his letters when he was nearly a hundred years old.
Moses wrote his five books when he was nearly one hundred and
twenty.
