Answer: It’s a gradual process which leads to an instantaneous revelation. We see this happening to us. We try doing this and that and nothing comes of it, but then suddenly we acquire an understanding and reveal something. We don’t understand how it happens. It’s as though there is something inside of us that slowly grows, then just bursts, and we suddenly gain understanding, sensation and attainment both in the mind and in the heart. This process requires great concentration over a long period of time and many continuous stages that ultimately lead to a sudden breakthrough.
From the 3rd part of the Daily Kabbalah Lesson 2/12/12, “Study of the Ten Sefirot”