Musar su Genesi 6:11

Now that our exile has lasted so long because of our many sins it is more important than ever that Israel should separate themselves from the vain things of the world and take hold of the Seal of the Holy One, Blessed be He, which is Truth — and sanctify themselves even in things that are permitted to them (Yebamoth 20a), and not to lie — not to a Jew and not to a heathen, and not to deceive them in any matter, as it is said, "The remnant of Israel shall not do iniquity, nor speak lies, neither shall a deceitful tongue be found in their mouth" (Zeph. 3:13). And it is further written, "And I will sow her unto Me in the land" (Hos. 2:25). Surely a man sows a seah in order to harvest many kurim, thus, the Holy One, Blessed be He, exiled Israel among the nations only so that proselytes might join them (Pesahim 87b). And so long as they conduct themselves among the heathens without guile, the latter will cleave to them. And behold the Holy One, Blessed be He, was furious with the wicked for their robbery, as it is said, "For the earth is filled with violence" (Gen. 6:11).

Whereas someone who fails to procreate by not emitting his semen is considered כאלו שופך דמים, as if he had spilled blood, a person who emits semen for purposes other than procreation has actually spilled blood and is guilty of death. This is why the people of the generation of the deluge were condemned to die, as we have outlined elsewhere. The important thing is that even if a person is סור מרע, abstains from doing evil by not wasting his semen and merely not impregnating his wife who is of childbearing age, he is still considered as if he had spilled blood. The reason is that man is to act like the אדם העליון (a facet of G–d), whose very function is the unending dispensation of שפע, abundance, acts of generosity. If, due to our sins, we do not experience this generosity on earth i.e. in the sphere of מלכות, from the emanation תפארץ which channels such שפע to Israel, as hinted at by the words אשר זרעו בו על הארץ [G–d's first command to provide that שפע in Genesis 1,11. Ed.], such שפע is granted to חצונים, unworthy creatures, and results in ותשחת הארץ, corruption of the earth (Genesis 6,11). The word זרעו should be read as 6) ,זרע-ו) since the sixth emanation is תפארת.