It has been put in our hands in the Scriptures. A little thunder and lightning might make us more appreciative, but, if we are anything like Israel, it probably would not make us more obedient. Moses beheld the glory of God, and it lit up his face. It took ten plagues to bring deliverance from Egyptian bondage, but it takes more than ten commandments to deliver us from unrighteousness. Only Christ can do that.
Freedom is sometimes more difficult to handle than bondage.
The people of Israel turned back to Egypt in their hearts. This was as abominable to God as if they had physically deserted Him and returned. It is in the nature of God to reveal His truth to man. At Sinai it was through Ten Words. Often we are the most vulnerable to sin following moments of high religious experience.