YHVH said to Moses, "Go to the people and consecrate them today and tomorrow, and let them wash their garments and be ready for the third day. For on the third day YHVH will come down on Mount Sinai in the sight of all the people."
#exodus 19:10-11 #yitro

This is not about salvation, but about communion with God. Clear, unclouded communication with YHVH requires intentional sanctification. Separate yourself from the things of the world and all sources of death and tamei (ritual uncleanness). Fast, pray, and purify your life if you want to hear God's voice and minimize interference from your own desires.