All will rise in the condition of perfect age, which is of thirty-two or
thirty-three years. This is because all who were not yet arrived at
this age, did not possess this perfect age, and the old had already lost
it. Hence, youths and children will be given what they lack, and what
the aged once had will be restored to them.
--St. Thomas Aquinas, The Catechetical Instruction of St. Thomas Aquinas