Tinyana 45 · תנינא מ״ה

Concerning those people who want to travel to the true tzaddik and prepare themselves again and again [to do so,] but afterwards encounter obstacles and so desist…

Know! Shabbat is the inner point. From it, all six weekdays draw sustenance. They are the concept of the circles around the point, as is written in the Zohar (II, 204a) and as is brought.

The forces of evil lead the wicked around the point, as in “The wicked go round about” (Psalms 12:9), preventing them from coming close to the inside, to the inner point. Now, as long as they are inside the circles, they still have hope of getting close. Even a Jewish sinner—as long as he has not gone out from the circles altogether, God forbid, he still has hope of getting close to the inner point. But someone who has already gone out completely from the circles, God forbid, such as an apostate, cannot possibly get close at all.

And the tzaddik is the concept of Shabbat, the concept of the inner circle from which everything draws sustenance, as is brought.