Baal HaSulam, article “Peace in the World”:
Man feels that all the creatures in the world should be under his own government and were created for his own private use. And this is a law of Nature that cannot be breached. The only difference between people is their choices of how to use the creatures: One chooses to exploit people by attaining the lowest desires, one chooses to attain power, while the third – to attain respect. Furthermore, if it could be done without much effort, every person would agree to exploit the whole world for attaining all three together: wealth, power and respect. This law is called the “Law of Singularity,” and is felt in the heart of every person. And there is not a person who can escape it, although each and every one takes his own share in that law: the great person according to his greatness, and the small person according to his smallness.
And although the attribute of singularity contains a sublime, beautiful and gracious meaning, since this attribute extends to us directly from the Creator, who is single in the world and the root of all creations, still when the sensation of singularity sits within our narrow egoism, its action becomes ruin and destruction and the source of all the suffering that was and will be in the world. And indeed there is not a single person in the world who is free from this attribute, and all the differences between people are only in the way it is used: whether for satisfying the passions of the heart, or for power, or for honor. This is what makes people different from one another.