Earth will Wither but there is nothing to fear

HH Rashi in Psalms 46:3 says that even though Earth is going to wither away, as it says in Isaiah 51:6, Israel has nothing to fear, the sons of Korach experienced this and prophesied that those faithful to HY have nothing to fear, for they will remain safe aloft in the air....

Na NaCh NaChMa NaChMaN MayUMaN