Here, you can just remember that Adam who was a living spirit took the untruth with his own freewill, and consequently became flesh that changes and perishes. Other than this, among the things that people have in their mind, hatred, envy, jealousy, pride, seeking one's own, etc. that are against God's Word, which is everlasting truth, are all flesh. Not only things that are visible, but also invisible things are flesh. The emotions and thoughts of people and values that people seek are not eternal but they change over time, and thus, they are all flesh. Flowers, trees, animals on this earth and the sun, the moon, and the stars all change, perish, and become extinct over time. They do not have eternal life but disappear and become extinct.
If you keep seeing angel number 333 in connection with a twin flame, trust that you and your twin flame are meant to be together. Additionally, this may be a moment when you're leaning on your twin flame for support. In esoteric symbolism, the zero, or