Chasidut su Salmi 17:78

Even with Ma’aseh Merkava, (the knowledge of the Mysteries of the Torah), one needs to learn with the goal of doing. This is as it is said in the Tractate Chagiga (14b), after Rabbi Elazar ben Arach had just cause the trees and mountains to sing, from his teachings of the Divine mysteries, “Rabbi Yochanan ben Zakkai said of Rabbi Elazar ben Arach, Blessed is the God of Israel who gave a son to Avraham Avinu who knows how to understand and teach the Ma’aseh Merkava. There are those who are good at explaining but cannot do. Then there are those who know how to do, but cannot explain. Fortunate are you, Avraham Avinu, that Rebbi Elazar ben Arach descended from you, who knows both how to teach and how to do!” From this we see that even with Ma’aseh Merkava one needs not only to know, but needs to perform and uphold. In the case where one knows how to do, but does not know how to learn, every soul of Israel who performs the Mitzvot in all their details is intending the very depths of God’s will. Then God considers it as if he has fulfilled all of the mystical intentions (kavonnot). So too, one who prays with the utmost simplicity and a pure heart, and knows nothing of the kavannot of the Kabbalists, also intends to fulfill the depths of God’s will, and God considers this as if he has prayed with the most lofty of kavanot. It is written in the Zohar (Vayehi, 243b): Rabbi Yossi and Rabbi Hizkiya asked Rabbi Shimon, ‘We are taught that one should begin by praising God, and then make his request. What about someone who wants to pray but his heart ill at ease, and is so disturbed that he can not properly praise God before asking for his needs?’ Rabbi Shimon answered them, ‘His prayer is no less, even if he cannot enter into the optimal frame of mind in order to praise God. He should make his praises even in his current state of mind. Then he should go ahead and ask. … However, a person who has the ability and the proper frame of mind to properly praise God before praying, yet does not, of him is it said (Yeshayahu, 1), ‘Though he pray much, I will not heed him.’ But for one who simply cannot collect his mind and achieve devekut,⁴⁶Devekut means intense cleaving to God. God nevertheless accepts his prayer and his divine service. The Zohar says that this is (Tehillim, 17:1), “Hear the right, O God, attend to my cry, hear my prayer.” This is an example of, “one who knows how to do, but does not know how to explain.”