Change is the fundamental truth of the universe.
Then humanity gets involved and some truths manage to double down and find ways to fight back against change. A knife is a knife is a knife. It has been a knife for fifty thousand years before the Deep appeared, and will remain a knife until humanity fully divests itself from the tyranny of solids. A knife can be manufactured from different materials. It can receive a charge which allows it to zip through rock-hard substances. The design can be altered until it twists back on itself in impractical and dangerous spirals. But the fundamentals of what makes it a knife form its own truth.
Same with streets. Same with clothing. Same with pets and funerals and music, with swimming pools and medication, with lighting and vehicles and toilets. With tables, toys, and dinnertime.
Same with war.