That no matter how you suffer in this life, if you are saved by Jesus Christ, who brings you to the Father:
"Never again will they hunger;
never again will they thirst.
The sun will not beat upon them,
or any scorching heat.
For the Lamb at the ceter before the throne
will be their shepherd;
He will lead them to springs of living water.
And God will wipe away every tear from their eyes".
(Rev 7:16-17)
In other words, this life that we live in, which brings heartache, tribulation, and much sorrow will be gone once we have entered the kingdom of God. Then we will experience true joy.