Likutei Moharan 250:1/ליקוטי מוהר"ן ר״נ:א׳

1Know! all manner of suffering and all afflictions are due only to a lack of daat. For someone who has daat, and so knows that everything is by Divine Providence, <certainly> experiences no affliction and feels no suffering, because “God has given; God has taken away” (Job 1:21).

2And although there are afflictions that we cannot help but feel, for example the afflictions caused by the [body-soul] compound—such as the affliction caused by the soul’s departure from the body; this being also the affliction of a person who is sick, which stems from the soul beginning to separate from the body, and since the soul is <compounded> with the body through a firm and powerful bond, he cannot help but feel the affliction at the time of separation—nevertheless, the afflictions are very mild, and are bearable when one knows with a clear daat that everything is by Divine Providence. All the more so, other forms of suffering and affliction, which a person does not feel at all when he possesses daat, as explained above.

3Thus, in the main, the suffering of the afflictions stems from their taking the daat away from him in order that he should feel the affliction.