Another matter, the Holy One blessed be He said: ‘If you read the Torah, you are performing a mitzva for the sake of My world, as were it not for the Torah, the world would have been restored to emptiness and disorder.’ Another matter, “for the mitzva” – what is “the mitzva”? The Rabbis say: It is a hard matter. To what is the matter comparable?
It is to a king who had a gem and he entrusted it to his friend. He said to him: ‘I beseech you, pay attention to it and guard it properly, as if it is lost, you do not have anywhere from which to repay me, and I do not have another one like it. The result will be that you will have sinned against me and against you. Instead, perform the mitzva on behalf of both of us, and guard it properly.’
So, Moses said to Israel: ‘If you observe the Torah, you will not only be acting charitably [tzdaka] for yourselves, but for Me and for you, as it is stated: “It will be, therefore, to our merit [tzdaka]” (Deuteronomy 6:25) – for Me and for you.’ When? “[It will be, therefore, to our merit…] if we observe to perform all this mitzva” (Deuteronomy 6:25).