לא יחל דברו ככל היוצא מפיו יעשה
Rashi defines Lo yacheil d’varo, “He shall not profane his word.” While he does not necessarily profane his word, the mere fact that he does not use his G-d-given speech/word for a purpose imbued with sanctity is considered profanity. When a person uses his G-d-given speech, it should be elevating, sanctifying, complimentary, obligating himself in higher, more consecrating endeavors. Even a mundane conversation which wastes time that could have been used to improve and enlighten is, by omission, a form of profaning. If we want Hashem to listen to our words, we must see to it that they have value…