Do not love the world or anything in the world. If anyone loves the world, the love of the Father is not in him. 1 John 2:15
“This world and the world to come are enemies. We cannot be friends of both. To get the one, we must give the other up. We think that is better to hate what is here, for it is trivial, temporary and perishable and to value what is there: things good and imperishable.”
Clement of Rome (martyred in 101 by being tied to an anchor and cast into the sea) in 2 Clement 6:3, 5, 6.