(Psalm 114) Tremble

Tremble, O earth, at the presence of the Lord, at the presence of the God of Jacob, who turned the rock  into  a pool of water, the flint into a fountain of waters.

This is a warning.  This is wise advice.  This is a reality check.  Who could not but tremble in the Lord’s presence?  Even His people are advised to rejoice with trembling.