Fear

(11) Some time after that, when Moses had grown up, he went out to his kinsfolk and witnessed their labors. He saw an Egyptian beating a Hebrew, one of his kinsmen. (12) He turned this way and that and, seeing no one about, he struck down the Egyptian and hid him in the sand. (13) When he went out the next day, he found two Hebrews fighting; so he said to the offender, “Why do you strike your fellow?” (14) He retorted, “Who made you chief and ruler over us? Do you mean to kill me as you killed the Egyptian?” Moses was frightened, and thought: Then the matter is known! (15) When Pharaoh learned of the matter, he sought to kill Moses; but Moses fled from Pharaoh. He arrived in the land of Midian, and sat down beside a well.

Happy is the man who is anxious always, But he who hardens his heart falls into misfortune.

With regard to the same verse, Rava said: After departing from this world, when a person is brought to judgment for the life he lived in this world, they say to him in the order of that verse: Did you conduct business faithfully? Did you designate times for Torah study? Did you engage in procreation? Did you await salvation? Did you engage in the dialectics of wisdom or understand one matter from another? And, nevertheless, beyond all these, if the fear of the Lord is his treasure, yes, he is worthy, and if not, no, none of these accomplishments have any value. There is a parable that illustrates this. A person who said to his emissary: Bring a kor of wheat up to the attic for me to store there. The messenger went and brought it up for him. He said to the emissary: Did you mix a kav of ḥomton, a preservative to keep away worms, into it for me? He said to him: No. He said to him: If so, it would have been preferable had you not brought it up. Of what use is worm-infested wheat? Likewise, Torah and mitzvot without the fear of God are of no value.

(2) TO FEAR— Our Rabbis derived from this that everything is in the hands of God except the fear of God (Berakhot 33b).

(10) Jacob left Beer-sheba, and set out for Haran. (11) He came upon a certain place and stopped there for the night, for the sun had set. Taking one of the stones of that place, he put it under his head and lay down in that place. (12) He had a dream; a stairway was set on the ground and its top reached to the sky, and angels of God were going up and down on it. (13) And the LORD was standing beside him and He said, “I am the LORD, the God of your father Abraham and the God of Isaac: the ground on which you are lying I will assign to you and to your offspring. (14) Your descendants shall be as the dust of the earth; you shall spread out to the west and to the east, to the north and to the south. All the families of the earth shall bless themselves by you and your descendants. (15) Remember, I am with you: I will protect you wherever you go and will bring you back to this land. I will not leave you until I have done what I have promised you.” (16) Jacob awoke from his sleep and said, “Surely the LORD is present in this place, and I did not know it!” (17) Shaken, he said, “How awesome is this place! This is none other than the abode of God, and that is the gateway to heaven.” (18) Early in the morning, Jacob took the stone that he had put under his head and set it up as a pillar and poured oil on the top of it. (19) He named that site Bethel; but previously the name of the city had been Luz. (20) Jacob then made a vow, saying, “If God remains with me, if He protects me on this journey that I am making, and gives me bread to eat and clothing to wear, (21) and if I return safe to my father’s house—the LORD shall be my God. (22) And this stone, which I have set up as a pillar, shall be God’s abode; and of all that You give me, I will set aside a tithe for You.”

...But the truths which the Law teaches us--the knowledge of God's Existence and Unity--create in us love of God, as we have shown repeatedly. You know how frequently the Law exhorts us to love God. Comp. "And thou shalt love the Lord thy God with all thine heart, and with all thy soul, and with all thy might" (Deut. 6:5). The two objects, love and fear of God, are acquired by two different means. The love is the result of the truths taught in the Law, including the true knowledge of the Existence of God; whilst fear of God is produced by the practices prescribed in the Law. Note this explanation.

Rabbi Chayim of Tzernovitz

It is known (Tikuney Zohar 25)

every Mitzvah and Torah that are without love and fear do not rise up.

that is why love and fear are called the two wings . They are like the wings of a bird that's using them to fly up to the sky. If the bird lacks its wing is cannot fly up in any way.

The same is with love and fear which are the two wings by which Torah and Mitzvot and prayer fly up to heaven.

When it is lacking the love and fear they are left without wings and therefore do not rise up

(1) It is mandatory to love and fear this Glorified and Awe-inspiring God, for it is said: "Thou shalt love the Lord thy God" (Deut. 6,5); and as it is said: "The Lord thy God thou shalt fear." (Ibid. 6, 13).