DEUT284 It is a positive commandment to fear Hashem as Scripture states, You shall fear Hashem your God [this verse]. The way toward reverent fear of Him is like the way to love for Him, as outlined [See Deuteronomy 6:5 love CCCBM 15]. When a sin comes to one's hand, he is duty-bound to arouse his spirit [to know] that the holy One, Blessed is He, watches every action of human beings. This is among the commandments that a person is obligated to observe at every occasion, constantly. And reverent fear includes the requirement not to pronounce the name of Heaven [God] in vain, purposelessly.