1)
Why did he say "Seiso Teva'es Eschem"?
1.
Rashi: His grandeur and awesomeness frightens you.
2.
Rashi: Some say that Seiso is His fire's burning, like "va'Yisa'em David va'Anashav", "Mas'as he'Ashan Min ha'Ir."
3.
Malbim: You spoke deceit only amidst fear of Him, but you did not conclude so in your hearts. His grandeur scares you, for you know your lowliness compared to Him.
