Death was not part of nature

Death was not part of nature; it became part of nature. God did not decree death from the beginning; he prescribed it as a remedy. Human life was condemned because of sin to unremitting labor and unbearable sorrow and so began to experience the burden of wretchedness. There had to be a limit to its evils; death had to restore what life had forfeited. Without the assistance of grace, immortality is more of a burden than a blessing.

St. Ambrose, from a book on the death of his brother

Well, ain't that the truth! I've often thought I didn't want to live forever and as a science fiction lover I've been shown many examples of what we imagine purely human immortality to be like. With a dose of God's grace, that makes it the "remedy" St. Anselm describes.