Hate is inseparable from love. This principle should be engrained in me so that it becomes my program in relation to the world, through which I look at everything. In this form, I always will be in the middle line, in the middle third of Tifferet, Klipat Noga, in the point of my free choice.
Otherwise, I cannot orient myself and do not know where I am: in the area of bestowal or reception, or in a complete fog. Until I form two opposite lines, I am not in the world, which can be a reality.
So we go through so many ups and downs until we begin to understand the weakness of being only in the right or only in the left line. To be just in the right or just in the left is an egoistic state, Klipah Ishmael or Esau.
And if I am in the right and in the left line in order to connect them and rise above them so that the right line is always a bit higher than the left one (as there is always an inclination to the right), then I build the middle line.
But they both are present and support each other. Through this system of two lines, it is possible to see the importance of bestowal, in comparison to reception. And if there is no reception, how can we check?
Therefore, hatred and rejection must exist. A person, who is not in close contact with his friends, does not want to connect, and stays on the sidelines, might have excellent relations with others, might be a good friend, quiet, and calm, but not be involved in the work.
On the other hand, someone, who is argumentative and volatile and who cannot get along with anyone, may be able to establish inner contact with friends. Not only do we need to consider this criterion check judged by such outward appearances, but everyone needs to examine oneself inside.
From the 1st part of the Daily Kabbalah Lesson 1/31/12, Writings of Rabash