SB 10.4.27
soka-harsa-bhaya-dvesa-
lobha-moha-madanvitah
mitho ghnantam na pasyanti
bhavair bhavam prthag-drsah
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
Persons with the vision of differentiation are imbued with the material qualities lamentation, jubilation, fear, envy, greed, illusion and madness. They are influenced by the immediate cause, which they are busy counteracting, because they have no knowledge of the remote, supreme cause, the Personality of Godhead.
Purport by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
Krsna is the cause of all causes (sarva-karana-karanam), but one who has no connection with Krsna is disturbed by immediate causes and cannot restrain his vision of separation or differences. When an expert physician treats a patient, he tries to find the original cause of the disease and is not diverted by the symptoms of that original cause. Similarly, a devotee is never disturbed by reverses in life. Tat te ’nukampam susamiksamanah (Bhag. 10.14.8). A devotee understands that when he is in distress, this is due to his own past misdeeds, which are now accruing reactions, although by the grace of the Supreme Personality of Godhead these are only very slight. Karmani nirdahati kintu ca bhakti-bhajam (Brahma-samhita 5.54). When a devotee under the protection of the Supreme Personality of Godhead is to suffer because of faults in his past deeds, he passes through only a little misery by the grace of the Lord. Although the disease of a devotee is due to mistakes committed sometime in the past, he agrees to suffer and tolerate such miseries, and he depends fully on the Supreme Personality of Godhead. Thus he is never affected by material conditions of lamentation, jubilation, fear and so on. A devotee never sees anything to be unconnected with the Supreme Personality of Godhead. Srila Madhvacarya, quoting from the Bhavisya Purana, says:
bhagavad-darsanad yasya
virodhad darsanam prthak
prthag-drstih sa vijñeyo
na tu sad-bheda-darsanah