Jesus talks about this concept in Luke chapter 6, verses 24-26. The heading in my Bible says, "Sorrows Foretold."
What sorrow awaits you who are rich, for you have your only happiness now.
Do I want to focus on my happiness now, for just a short time, or would I rather focus on being happy later, for eternity? I can spend my days consumed with thoughts of my comfort, wealth and status. These things may bring me happiness, but it will be short-term. Or I can choose to live consumed by God and have joy for all eternity.
What sorrow awaits you who are fat and prosperous now, for a time of awful hunger awaits you.
I can be concerned about me or about Jesus. If I'm concerned about Jesus now, I will feast for eternity. If I'm concerned about me now, I will hunger for eternity.
What sorrow awaits you who laugh now, for your laughing will turn to mourning and sorrow.
I can repent (be sorry for) my sins, live for Jesus now, and rejoice for eternity, or I can live as I please now, and spend eternity where there will be weeping and gnashing of teeth. (Matthew 25:30)
What sorrow awaits you who are praised by the crowds, for their ancestors also praised false prophets.
I can live seeking man's approval or God's. Man's approval is fickle and lasts for a moment; God's approval lasts forever. I want to hear Him say, "Well done, my good and faithful servant." (Matthew 25:23)
What will you choose - now or later?
Choose TODAY whom you will serve . . . as for me and my family, we will serve the LORD. Joshua 24:15
TODAY, if you hear his voice, do not harden your hearts as in the rebellion. Hebrews 3:15
But encourage one another daily, as long as it is called TODAY, so that none of you may be hardened by sin's deceitfulness. Hebrews 3:13