MADNESS
(References from the Srimad Bhagavatam)

"In this materialistic life, there are many difficulties, as I have just mentioned, and all of these are insurmountable. In addition, there are difficulties arising from so-called happiness, distress, attachment, hate, fear, false prestige, illusion, madness, lamentation, bewilderment, greed, envy, enmity, insult, hunger, thirst, tribulation, disease, birth, old age and death. All these combine together to give the materialistic conditioned soul nothing but misery."
SB 5.14.27
"Just as by executing various pious activities one achieves different positions in heavenly life, by acting impiously one achieves different positions in hellish life. Those who are activated by the material mode of ignorance engage in impious activities, and according to the extent of their ignorance, they are placed in different grades of hellish life. If one acts in the mode of ignorance because of madness, his resulting misery is the least severe. One who acts impiously but knows the distinction between pious and impious activities is placed in a hell of intermediate severity. And for one who acts impiously and ignorantly because of atheism, the resultant hellish life is the worst. Because of ignorance, every living entity has been carried by various desires into thousands of different hellish planets since time immemorial. I shall try to describe them as far as possible."
SB 5.26.3
"By these activities [as mentioned above] one is able to cut down the influence of the enemies, namely lust, anger, greed, illusion, madness and jealousy, and when thus situated, one can render service to the Lord. In this way one surely attains the platform of loving service to the Supreme Personality of Godhead."
SB 7.7.33
"In the conditioned stage, one's conceptions of life are sometimes polluted by passion and ignorance, which are exhibited by attachment, hostility, greed, lamentation, illusion, fear, madness, false prestige, insults, fault-finding, deception, envy, intolerance, passion, bewilderment, hunger and sleep. All of these are enemies. Sometimes one's conceptions are also polluted by goodness."
SB 7.15.43-44
"When the she-goat, who had very nice hips, got out of the well and saw the very handsome he-goat, she desired to accept him as her husband. When she did so, many other she-goats also desired him as their husband because he had a very beautiful bodily structure and a nice mustache and beard and was expert in discharging semen and in the art of sexual intercourse. Therefore, just as a person haunted by a ghost exhibits madness, the best of the he-goats, attracted by the many she-goats, engaged in erotic activities and naturally forgot his real business of self-realization."
SB 9.19.5-6
"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."
SB 10.4.27
"The evil witches known as Dakinis, Yatudhanis and Kusmandas are the greatest enemies of children, and the evil spirits like Bhutas, Pretas, Pisacas, Yaksas, Raksasas and Vinayakas, as well as witches like Kotara, Revati, Jyestha, Putana and Matrka, are always ready to give trouble to the body, the life air and the senses, causing loss of memory, madness and bad dreams. Like the most experienced evil stars, they all create great disturbances, especially for children, but one can vanquish them simply by uttering Lord Visnu's name, for when Lord Visnu's name resounds, all of them become afraid and go away."
SB 10.6.27-29