Answer: The heart is our egoism, and the point in the heart is the impulse toward the Creator, toward the quality of bestowal, that is latent in us from the start. Otherwise we would not be able to perceive the differences that are happening in us.
We are composed of two parts: a heart and a point in the heart. Within these two opposite characteristics, we can begin to see the direction of our development, how we can rise above our heart toward the point in the heart or the opposite.
From the Kabbalah Lesson in Russian 4/2/17