The author of the Tanya addresses. every Jew and discussing the most fundamental point, the “beginning of divinevservice,” which is the natural fear that is hidden in the heart of every Jew.
Therefore, just as he does not define objectives, he likewise does not stipulate the amount of effort required.
Rather, everyone is to act “in accordance with the capacity of his mind and thoughts to comprehend.”
Not everyone has the mental capability necessary to absorb and analyze abstract matters, and certainly some people cannot do this as well as others.
For some, abstract forms are crude, unclear, and almost meaningless, whereas for others they are more clear and real.
Therefore, at the outset, the author of the Tanya does not discuss contemplating the Torah’s mysteries, nor does he use complex, kabbalistic terms.
Rather, he employs the simplest of images, which everyone, even a child, can contemplate, each person in accordance with his capabilities.
Rabbi Adin Steinsaltz