Deuteronomy 11:22

... " To follow in all of His ways"- He is merciful and you should be merciful, He performs acts of kindness and you should perform acts of kindness

..."And to cling to Him"- Is it possible to say thus? But is He not a consuming fire? Rather cling to Torah scholars and I will consider it about you as if you attached yourself to Him

For if you diligently keep every commandment that I command you to do it, to love the Lord your God, and walk in all the ways that are right before Him, and cleave unto His fear,

Whereas I.e., concerning that which I mentioned earlier — that you would “perish quickly from upon the good land” — realize that you will not even arrive there in the first place, and you will not conquer it, if you do not observe God ’s commandments.

to love in one’s heart.

to walk in all His ways and neither stray, nor turn back

cleave to Him upon expiring (this is a great mystery).

AND TO CLEAVE UNTO HIM. Rabbi Abraham ibn Ezra commented: “[You are to walk in His ways so that you will merit to cleave unto Him] ultimately, this being a great secret.” But the secret is not by reason of this reference [here in the verse before us]. Perhaps he is stating: “to love the Eternal, to walk in all His ways until you become worthy to cleave unto Him in the end” [as Ibn Ezra wrote]. But in the Book of Joshua it is stated, Neither make mention of the name of their gods, nor cause to swear by them, neither serve them, nor worship them; but cleave unto the Eternal your G-d, as ye have done unto this day [thus indicating that “cleaving to G-d” was not an ultimate goal, but something they had been experiencing all along]. If so, the verse [before us] is one of the admonitions against idolatry, meaning that one’s thought should not part from G-d [and transfer] to other gods, that one should not think that there is any substance to idolatry but instead it is all nought and worthless. Thus this verse is similar to what he said, and Him shall ye serve, and unto Him shall ye cleave, the intent being to warn that one is not to worship G-d [in combination] with anything besides Him, but to worship [only] G-d alone, with one’s heart and deeds.
It is possible that the term “cleaving” includes the obligation that you remember G-d and His love always, that your thought should never be separated from Him when thou walkest by the way, and when thou liest down, and when thou risest up to such a degree that [a person] during his conversation with people by mouth and tongue, his [entire] heart will not be with them, but instead be directed towards G-d. With men of such excellence it is possible that even in their lifetime, their souls shall be bound in the bundle of life, since their very being is a “residence” for the Divine Glory, as the author of the Book of the Kuzari alludes. I have already mentioned this matter in the section on forbidden relations. And when Joshua said as ye have done unto this day he meant, that when they were in the wilderness and the cloud of the Eternal was over them, and the manna would descend from heaven, and the quail would come up and the well was always before them, and all their requirements were provided by Heaven in miraculous ways — then their thoughts and deeds were [perforce] always with G-d. Therefore Joshua warned them that even now in the Land, when these wonderful deeds would be removed from them, their thoughts should always be with them [i.e., the wonders that G-d had done for them], to cleave unto the glorious and fearful Name and their attention should not be withdrawn from Him.

כי אם שמור תשמרון לאהבה, the thrust of your preoccupation with Torah is to be that you show the acts of loving kindness G’d has performed, which in turn will ensure that you love Him.

ללכת בכל דרכיו, to emulate the way in which He governs His universe, i.e. application of justice and righteousness.

ולדבקה בו, all your actions should strive to carry out His will, as Proverbs 3,6 בכל דרכיך דעהו!