God's personal letter to us is all that ultimately lasts & matters

"All flesh is as grass, and all the glory of man as the flower of the grass. The grass withers, and its flowers fall away, but the word of the Lord endures forever." Now this is the word which by the gospel was preached to you." 1 Peter 1:24-25, NKJV

Though life and our flesh are only temporary (and always extremely fleeting), God and His letter stand firm and perfect throughout all of eternity, so cling to it as much as possible and obey its statutes (while helping others understand it by telling them how it's helping you)...