"Will matter be destroyed, or not?"
The Savior replied, "All natures, all formed things, all creatures exist in and with each other, and they will dissolve into their own root.  The nature of matter is dissolved into the root of its nature.  Whoever has ears to hear should hear."

Everything is connected, part of the whole.  A more generalized version of what the Quantum Physicists call "entanglement".
The root of matter and everything material is spirit.  Matter did not generate spirit, spirit degenerated into matter.
In the end, matter will not be destroyed, it will become spirit again.
The last sentence is an interesting one that is often ignored. Frequently in Christian scripture, sayings or passages end with some variation of "Whoever has ears should hear" or "Whoever has eyes let him see".  If we took those statements literally, they would seem very obvious and unnecessary.  Of course you can't see if you don't have eyes and can't hear if you don't have ears.  What Jesus and other prophets mean when they say this, Is "whoever has SPIRITUAL eyes...", and "Whoever has SPIRITUAL ears...".  If your soul is awakened and your spiritual ears and eyes have been opened, you will understand what is meant when prophets talk about spiritual things.  If they are not, you can't understand except in a very vague and limited way.  And in most cases, when scripture says Jesus made the blind see and the deaf hear, it is the spiritual eyes and ears that he healed.