How do we know our days are numbered?

The Bible teaches that each individual's days are predetermined by God. In Job 14:5, it states, 'Seeing his days are determined; the number of his months are with thee.' This perspective stresses that God has established the bounds of our lives, and no effort or means can change that predetermined timeline. Furthermore, in Hebrews 9:27, it is affirmed that 'it is appointed unto men once to die.' These passages collectively reinforce the sovereign grace theology that emphasizes God's ultimate control over life and death, urging believers to live wisely in light of their mortality.