Responsa do Psalmów 25:2

They responded: "The glory of God, conceal the matter," (Psalms 25:2) "And all who bless are blessed" (Sotah 38b) "By the true God." (Isaiah 65:16). I was unsure of the meaning of this response, so I asked my question again. They responded: the blessing for Torah-study is different to that of other commandments. Since enjoyment of the Torah is constantly part of human life, it was endowed with three separate blessings - "La'asok," "Veha'arev," and "Asher Bachar". The blessing of "La'asok" relates to the commandment; that of "Veha'arev" is a prayer that we merit to learn and teach, while "Asher Bachar" is a blessing of thanksgiving, since all Israel is required to give thanks to God who chose them from among the nations and gave them the Torah. There were also two blessings instituted before the recitation of the Shema, in the morning and in the evening, whose essence is also about enjoyment of the Torah. Other blessings however have a short formulation, and they are recited each time after an interruption in the action they refer to. This explains the blessing instituted in honour of the Torah reading in the synagogue, which is "Asher Bachar", and the sages didn't require us to recite the blessing "La'asok" on fulfilling a commandment, or the blessing "Veha'arev," which is a prayer. And since it is in the form of a prayer, all three were instituted as part of the morning prayers.