Musar zu Bereschit 1:11

All other creatures on earth would have shared in a "higher" existence; there would not have been any trees that failed to produce edible fruit, for instance. When you look closely at the instruction issued by G–d to the Earth on the third day, you will find that the trees were meant to be edible themselves, i.e. the trunk, not just the fruit (Genesis 1,11). Earth did not comply with G–d's command completely, since it was aware that G–d would have to hide the Original Light due to the eventual emergence of wicked people. This prompted Earth to withhold some of its goodness also. The reason that the tree itself was to taste the same as its fruit is to elevate the קליפה, "peel," exterior, to the level of the essence, i.e. the fruit. When the level of spirituality is such that the קליפה has become insignificant, then the function of the tree of life has been fulfilled, i.e. every tree will be an עץ החיים.

All other creatures on earth would have shared in a "higher" existence; there would not have been any trees that failed to produce edible fruit, for instance. When you look closely at the instruction issued by G–d to the Earth on the third day, you will find that the trees were meant to be edible themselves, i.e. the trunk, not just the fruit (Genesis 1,11). Earth did not comply with G–d's command completely, since it was aware that G–d would have to hide the Original Light due to the eventual emergence of wicked people. This prompted Earth to withhold some of its goodness also. The reason that the tree itself was to taste the same as its fruit is to elevate the קליפה, "peel," exterior, to the level of the essence, i.e. the fruit. When the level of spirituality is such that the קליפה has become insignificant, then the function of the tree of life has been fulfilled, i.e. every tree will be an עץ החיים.

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.