This day is associated with Torah texts. It is therefore the correct occasion to once again mention the great virtue of Torah texts: It is explained in the Halachic writings, particularly those of the Rosh ... [See Lekutei Sichos, vol.23, p.17 and onward] that nowadays, purchasing Torah texts is included in the fulfillment of the Biblical commandment for each Jew to write his own Torah scroll. Further, according to most methods of listing the Torah’s commandments, writing a personal Torah scroll is the very last of the 613 commandments; since every aspect of Torah contains the utmost precision – particularly matters that appear at the very opening or conclusion of the entire Torah – we could readily appreciate the great virtue of this commandment – being placed as it was, at the conclusion of all the commandments.
Even according to the opinions that differ and hold that purchasing Torah texts is not included in the Biblical commandment, it is nevertheless – in their opinion – a Rabbinic commandment. And Hashem tells us that “the words of the Rabbis are more precious” to Him; their neglect is also considered “more severe.”
It follows, that according to all opinions, the purchasing of Torah texts is uniquely important.
In fact, by purchasing them, we gain both virtues – the virtue of a Biblical command (in accordance with the Rosh) coupled with the quality of a Rabbinic commandment (according with the alternative views).
This could be applied all sacred texts – and in particular to texts discussing the inner dimension of Torah’s teachings; they all contain the power of holy writings. (Night after Hei Teves 5749; Hisva’aduyos p.103)