B.G 14.19

When the observer sees no agent other than the qualities and understands what is beyond them, he reaches My-Nature.

Gīta Tātparya 14.11

A person who perceives any other as actor than the Lord Vishnu is equal to a human-beast, as he is bound by the three qualities. He does not understand the three qualities as mere manifestations of the goddess Lakshmi, who is the consort of Lord Vishnu. A person who is constantly aware of Lord Vishnu as the real actor, gets liberated and attains 'madbhāvaṃ', i.e. My-Nature. In the word 'duḥkham' (14.16), etymologically the sound 'duh' refers to suffering and the sound 'kham' refers to happiness. Thus, it is happiness intertwined with suffering.

When one perceives a different entity as the doer apart from the Lord, who is the Lord of qualities like sattva, he ceases to be a true human. He becomes akin to an animal. (The true seeker) does not see Lord Vishnu merely as different, but as the supreme among qualities. How can he be otherwise? Such a person attains 'madbhāvaṃ', i.e. My-Nature.

"The great goddess Lakshmi, who is the supreme consort of Narayana, is known by the name Prakriti, who excellently does what she does. She possesses three forms known as goodness, passion, and ignorance. During creation, these are divided, with goddess Lakshmi possessing goodness, who is the radiance of virtues. Due to the role of passion in colouring, goddess Bhū is responsible for creation; because of whose influence, this earth is indeed called by the same name. Goddess Durga is praised as darkness because she governs the suffering of all beings. All beings who are bound by these three aspects do not achieve liberation. All things bind all, yet especially goddess Lakshmi binds men divinely, while the goddess Bhū binds demons. By understanding Viṣṇu to be supreme and distinct from all, liberation is attained. Due to the exceptional power and excellence of these goddesses, nothing surpasses these. Thus, as long as one is bound by these (three), they consider him a mere human-beast. Therefore, Viṣṇu is always to be recognized as more qualified than these (three)."

- stated thus in the great Vishnu Purana.

The outcome of passion is indeed stated here as suffering, as it is happiness intertwined with suffering.

"In the word 'duḥkham', etymologically the sound 'duh' refers to suffering and the sound 'kham' refers to happiness."

- stated thus in Shabdanirṇaya, the decision of words.

"Actions performed in the mode of passion yield results that are a mixture of happiness and distress, while actions in the mode of ignorance result in perpetual distress."

- stated thus in the Skanda Purana.