don't focus only on the world
Allah says: Allah wants to forgive you, but people who follow their desires want you to turn away from the truth (An-Nisaa: 27)
Whoever makes his goal only this world will only think about it. Whoever makes his goal the hereafter will only think about it.
(from Syajaratul Ma‘arif, Syaikh al-‘Izz bin Abdus Salam)