1 Peter 1:22-25 & 2:1-3 Having purified your souls by your obedience to the truth for a sincere brotherly love, love one another earnestly from a pure heart, 23 since you have been born again, not of perishable seed but of imperishable, through the living and abiding word of God; 24 for
“All flesh is like grass and all its glory like the flower of grass.
The grass withers, and the flower falls,
25 but the word of the Lord remains forever.”

And this word is the good news that was preached to you.

2:1 So put away all malice and all deceit and hypocrisy and envy and all slander. 2 Like newborn infants, long for the pure spiritual milk, that by it you may grow up into salvation— 3 if indeed you have tasted that the Lord is good.