I have an older saying that belongs to the cousin of prophet Mohamed peace be upon him, Ali:

Do for your worldly life as if you will live forever, and do for your afterlife as if you will die tomorrow.

مقولة سيدنا علي: اعمل لدنياك كأنك تعيش أبدا واعمل لآخرتك كأنك تموت غدا