“In secret” means in court. This is about egoistically destroying an opportunity for your next action of correction. If I take a desire and instead of correcting it I pull it away from my action, then I kill it within myself, which means “to strike my fellow in secret.” I curse myself by this.
The damage of the soul by a person or the damaging of “a person” within oneself is called a curse.
Question: In other words, must I take care of my neighbor, as if to educate him?
Answer: Of course, this is your desire. The Torah does not speak about anything other than the desires that are within each of us. It tells us how to correct them and how to become similar to the Creator.
Therefore, all the things the Torah speaks about such as sheep, goats, cows, plants, and even more so, people—in all their external manifestations—imply different desires within a person. The Torah indicates clearly what you can and cannot do. Therefore, it tells you what you don’t touch, what is not yours, and what the system itself will correct for you.
Question: Can we say that if I do not aspire to fulfill the law “love your neighbor as yourself,” then it is as if I kill my neighbor?
Answer: Of course because your “mother-in-law,” your “wife,” your “mother,” and your “father,” no matter who and what they are, are all within you. If you correct them incorrectly, you kill them.
Question: Does it mean that humanity is now in a state of “killing its neighbor”?
Of course, and especially within oneself; we kill our soul within ourselves.
From KabTV’s “Secrets of the Eternal Book” 11/23/16