The Most Powerful word in scripture "LET"

Ok, so a friend and I were just texting and we were talking about the most powerful words in scripture.... we were just talking when we both thought .... LET!Mary: "Let it be done unto me according to thy Word."Psalmist: "Let everything that has breathe ...."Paul: "Let the Word dwell richly ...."We were thinking ... What if we wrote all of them down.... What I great Bible study, message, or even blog....So here it goes.... CAN YOU THINK OF ONE? Then comment on this!