How can Peter's first Epistle comfort us?

The first Epistle of Peter is can be interpreted in different ways one of them as a warning, that is in order to prepare and bolster the Christians for the trials ahead. The Epistle says that even though there will be tremendous suffering ahead it will all be worth it as theirs will be the Kingdom of Heaven. This can comfort people to know that peace and joy will come eventually, or in other words more commonly said that there will be a rainbow after the rain.