Baal HaSulam, “Introduction to the Book Panim Meirot uMasbirot,” Item 3: It is known that the beneficial force and the detrimental force go hand in hand. In other words, as much as something can benefit, so it can harm. Hence, since the force of one person is greater than all the beasts and the animals of all times, one’s harmful force supersedes them all, as well.
Thus, as long as one does not merit one’s degree in a way that one uses one’s force only to do good, one needs a careful watch so he will not acquire great amounts of the human level, which is wisdom and science.
For this reason, the first sages hid the wisdom from the masses for fear of taking indecent disciples who would use the force of the wisdom to harm and damage. These would break and destroy the entire population with their lust and beastly savageness, using man’s great powers.
If humanity were given too much power that compared to its mind, it becomes dangerous. It’s like a child who grows to be two meters tall and weighs 200 kilos but remains mentally undeveloped and therefore he could perform dangerous actions.
It’s the same with humanity who has received nuclear bombs and is armed with immense quantities of the most modern weaponry. Weapons are the most common, most popular, and profitable commodity today.
However, unfortunately, the human brain lags behind technological advancement. Our leaders are becoming shallower and hardly know anything about this world and where it’s headed. The problem is that we have used advanced technology to develop tools that only empower our ego, the egoistic desire to receive, instead of weakening it. So we have brought ourselves to a position that we have armed our ego to such an extent that we don’t know how to get rid of it now, and this is a real problem.
This is why our sages warned that the wisdom mustn’t be revealed to just anyone because people can use it to harm others. Therefore, they concealed the wisdom from the masses. However, today things have changed and anyone can go to a university and study anything and then use it according to his egoistic desire. Today you can surf the Internet and find instructions for building a nuclear bomb by yourself. You can learn how to do anything.
But it was different when it came to the wisdom of Kabbalah. Kabbalists didn’t allow themselves to open the wisdom of Kabbalah and waited until people began to despair from the egoistic progress in this world. Only then, did it become possible to convey this wisdom to them and only so it could help them fulfill correction. Otherwise it’s impossible to use it.
It’s impossible to use it to harm yourself and to harm others. There is a condition to the wisdom according to which you cannot use its powers unless you acquire a Masach (screen) and the Returning Light, vessels of bestowal, love of others, and connection to others. You don’t have these features, but if you have them and use them wrongly, these powers will immediately disappear.
From the 4th part of the Daily Kabbalah Lesson 3/9/14, Writings of Baal HaSulam