Revelation 2:8-11. This is the letter to the church in Smyrna. What do learn from the letter to this church?

Revelation 2:8-11 NRSV
8 “And to the angel of the church in Smyrna write: These are the words of the first and the last, who was dead and came to life:

9 “I know your affliction and your poverty, even though you are rich. I know the slander on the part of those who say that they are Jews and are not, but are a synagogue of Satan. 10 Do not fear what you are about to suffer. Beware, the devil is about to throw some of you into prison so that you may be tested, and for ten days you will have affliction. Be faithful until death, and I will give you the crown of life. 11 Let anyone who has an ear listen to what the Spirit is saying to the churches. Whoever conquers will not be harmed by the second death.

Revelation 2:8-11 NIV
8 “To the angel of the church in Smyrna write:

These are the words of him who is the First and the Last, who died and came to life again. 9 I know your afflictions and your poverty—yet you are rich! I know about the slander of those who say they are Jews and are not, but are a synagogue of Satan. 10 Do not be afraid of what you are about to suffer. I tell you, the devil will put some of you in prison to test you, and you will suffer persecution for ten days. Be faithful, even to the point of death, and I will give you life as your victor’s crown.

11 Whoever has ears, let them hear what the Spirit says to the churches. The one who is victorious will not be hurt at all by the second death.