There are multiple references to this in the Bible. This is the most uplifting one I found.
Psalm 90
10 Our days may come to seventy years, or eighty, if our strength endures; yet the best of them are but trouble and sorrow, for they quickly pass, and we fly away.
11 If only we knew the power of your anger! Your wrath is as great as the fear that is your due.
12 Teach us to number our days, that we may gain a heart of wisdom.
13 Relent, LORD! How long will it be? Have compassion on your servants.
14 Satisfy us in the morning with your unfailing love, that we may sing for joy and be glad all our days.
There's a big cake mix manufacturing plant near where I grew up, and I knew a lot of people who worked there. They all confirmed that the only difference between the name brand cake mix and the store brand they made was the box they put it into at the end of the process.