Musar su Salmi 63:78

And anything which he deems to be detrimental to this, he should flee from it as one flees from fire, similar to what is written: "my soul clings after You, Your right hand upholds me" (Ps. 63:9).

ועשית עמדי חסד ואמת . The main ingredient of חסד, kindness, is that it be performed without expectation of a reward. Only when performed thus is one called generous; otherwise one is simply a trader. There is no greater virtue than that of חסד. This is why a person must train himself to practice this virtue until it becomes second nature to him. Not only should he perform acts of kindness for the dead, but even more so for the living. By doing so he will emulate the virtues practiced by G–d Himself who constantly performs acts of kindness without any thought of compensation. Concerning this David has said in Psalms 63,4: "For truly Your kindness is better than life itself; my lips declare Your praise." David meant that whereas when human beings practice acts of altruistic loving-kindness, this is almost always with the dead. You, G–d, perform deeds of loving-kindness for the living, by the very fact that You grant us our life. What could we possibly do in the way of compensating You!? All we can do is to pay You lip-service, extol Your virtues in song and prayer. Rashi referred to this in his commentary on 49,21, where he interprets the אמרי שפר as an allusion to the song of victory sung by Deborah after Israel defeated Sisera under her leadership. G–d performs the miracles and all we can do in return is to acknowledge them with our lips.

And our sages of blessed memory said "whoever scrutinizes his ways in this world merits to see the salvation of the holy One blessed be He".

You already know that what is most desired in the service of G-d, may His Name be blessed, is desire of the heart and longing of the soul. It is concerning this that King David praised his portion saying: "As a deer yearns longingly for the water brooks, so does my soul yearn longingly to You, O G-d; My soul thirsts for G-d..." (Tehilim 42:1-2), "My soul longs, and goes out for the courtyards of G-d" (Tehilim 84:2). "My soul thirsts for You; my flesh longs for You [in an arid and thirsty land (Rashi-desert), without water]"(Tehilim 63:2).

This looking into will cause him to not grow lazy or lax in His service. For since it is impossible for him to repay G-d, blessed be His Name, for His goodness, he will feel that at least he can thank His Name and fulfill His commandments.

Behold, this is the precious trait which the Pious men of old, the lofty holy ones had merited to attain. As king David said: "As a hart cries longingly for the water brooks, so does my soul cry longingly to You, O G-d; My soul thirsts for G-d, for the living G-d; when shall I come and appear before G-d?" (Tehilim 42:2-3), and "My soul yearns, yes, faints for the courts of the L-rd" (Tehilim 84:3), "My soul thirsts for You; my flesh longs for You..." (Tehilim 63:2). All this due to his powerful yearning to the blessed G-d.

This is likewise as the prophet said: "to Your Name and to Your remembrance is the lust of [our] soul" (Isaiah 26:8), and "my soul yearns for You in the night; my spirit within me seeks You" (Isaiah 26:9). And David himself said: "when I remember You on my bed, through the night watches I meditate about You" (Tehilim 63:7). Thus he described the pleasure and delight he experienced when speaking of and praising G-d, blessed be His Name. Likewise he said: "I will delight myself in Your Commandments, which I love" (Tehilim 119:47), and "Your testimonies are my delight..." (Tehilim 119:24).

The Torah exhorts us many times on the clinging [to G-d]: "to love the L-rd your G-d.. and to cling to Him" (Devarim 30:20), "to Him shall you cling" (Devarim 10:20, 13:5). And David said: "my soul clings to You" (Tehilim 63:9). All these verses speak of one matter, namely, the clinging with which a man clings to G-d, blessed be He, to such an extent that he is unable to part or move from Him.

The exertion is that which a man completely detaches and removes himself from the physical, and clings always, at all periods and times to his G-d. In this manner, the prophets were called "angels", as said of Aharon: "For a priest's lips shall guard knowledge, and Torah shall be sought from his mouth; for he is an angel of the L-rd of Hosts" (Malachi 2:7), and it is said: "but they mocked the angels (prophets) of G-d" (Divrei Hayamim II 36:16). Even when he is engaged in physical actions required for his bodily side, his soul will not budge from its clinging on high. This is as written: "my soul clings after You; Your right hand supports me"(Tehilim 63:9).