John Paul II is the pope who founded World Youth Day and he was also a pope who wrote a lot. Among other things, he wrote SALVIFICI DOLORIS, a letter about the meaning of suffering. In this letter, he explains how through our suffering we can, in some way, unite ourselves to the Passion of Christ. He also explains that we cannot unite ourselves to the Cross through a temporal dimension (because we are not in the year 33), nor through a spatial dimension (because we are not in Jerusalem), but through the dimension of love.
This piece of advice helped me a lot. Sometimes, we need to know how to look for information or find a good book and then share its content, because it is good to give advice to those that need it.