We have a different understanding of the death of the soul. Jesus said, "And fear not them which kill the body, but are not able to kill the soul: but rather fear him which is able to destroy both soul and body in hell." -- Matthew 10:28. Hell aka the second death. Revelation 21:8.
Yes, we do have a different understanding, but who is to say your understanding is correct and my understanding is incorrect?
Matthew 10:28 And fear not them which kill the body, but are not able to kill the soul: but rather fear him which is able to destroy both soul and body in hell.
Where in that verse does it say the soul will experience physical death, annihilation? It says "destroy." To me, destroying the soul means that soul will experience spiritual death, so it will not have eternal life as do the souls of those who are near to God.
Matthew 16:24-26 Then said Jesus unto his disciples, If any man will come after me, let him deny himself, and take up his cross, and follow me. For whosoever will save his life shall lose it: and whosoever will lose his life for my sake shall find it. For what is a man profited, if he shall gain the whole world, and lose his own soul? or what shall a man give in exchange for his soul?
Jesus was saying to deny our selfish desires, things we want that are not of God, and to follow in His Way. For whoever will live for self shall lose his eternal life, but whoever will sacrifice his life for the sake of Jesus and God shall gain eternal life. It is the soul that gains eternal life, not the body.
So if we live for self and the worldly things we gain the whole world but we
lose our soul because our soul will not gain eternal life, it will lose eternal life. In that sense our soul dies. However, since the soul is immortal, it continues to exist in the spiritual world after their physical body dies.
“In the same way, the souls who are veiled from God, although they exist in this world and in the world after death, are, in comparison with the holy existence of the children of the Kingdom of God, nonexisting and separated from God.”
Some Answered Questions, p. 243
Baha’u’llah wrote the same thing as Jesus said regarding the soul that does not deny self, the destination of such a soul:
“If it fail, however, in its allegiance to its Creator, it will become a victim to self and passion, and will, in the end, sink in their depths...” means it sinks into hell.
“Thou hast asked Me concerning the nature of the soul. Know, verily, that the soul is a sign of God, a heavenly gem whose reality the most learned of men hath failed to grasp, and whose mystery no mind, however acute, can ever hope to unravel. It is the first among all created things to declare the excellence of its Creator, the first to recognize His glory, to cleave to His truth, and to bow down in adoration before Him. If it be faithful to God, it will reflect His light, and will, eventually, return unto Him. If it fail, however, in its allegiance to its Creator, it will become a victim to self and passion, and will, in the end, sink in their depths...”
Gleanings From the Writings of Bahá’u’lláh, pp. 158-159
There are many different understandings of the second death. How do you know your understanding is correct?
I do not have an understanding because I never took the time to interpret those verses.