
For we must hold, that our mind never rises seriously to desire and aspire after the future, until it has learned to despise the present life.
For there is no medium between the two things: the earth must either be worthless in our estimation, or keep us enslaved by an intemperate love of it. Therefore, if we have any regard to eternity, we must carefully strive to disencumber ourselves of these fetters. Moreover, since the present life has many enticements to allure us, and great semblance of delight, grace, and sweetness to soothe us, it is of great consequence to us to be now and then called off from its fascinations.
John Calvin. The Golden Booklet on the True Christian Life.