O son of Kuru, when there is an increase in the mode of ignorance, madness, illusion, inertia and darkness are manifested.
(Srimad Bhagavatam----7:1:8----purport).

When one's higher awareness fails and finally disappears and one is thus unable to concentrate his attention, his mind is ruined and manifests ignorance and depression. You should understand this situation to be the predominance of the mode of ignorance.
(Srimad Bhagavatam----11:25:18----translation).

When there is a predominance of cheating, lying, sloth, sleepiness, violence, depression, lamentation, bewilderment, fear and poverty, that age is Kali, the age of the mode of ignorance.
(Srimad Bhagavatam----12:3:30----translation).

Happiness derived from the self is in the mode of goodness, happiness based on sense gratification is in the mode of passion, and happiness based on delusion and degradation is in the mode of ignorance. But that happiness found within Me is transcendental.
(Srimad Bhagavatam----11:25:29----translation).

Food that is wholesome, pure and obtained without difficulty is in the mode of goodness, food that gives immediate pleasure to the senses is in the mode of passion, and food that is unclean and causes distress is in the mode of ignorance.
(Srimad Bhagavatam----11:25:28----translation).

Faith directed toward spiritual life is in the mode of goodness, faith rooted in fruitive work is in the mode of passion, faith residing in irreligious activities is in the mode of ignorance, but faith in My devotional service is purely transcendental.
(Srimad Bhagavatam----11:25:27----translation).

Absolute knowledge is in the mode of goodness, knowledge based on duality is in the mode of passion, and foolish, materialistic knowledge is in the mode of ignorance. Knowledge based upon Me, however, is understood to be transcendental.
(Srimad Bhagavatam----11:25:24----translation).

A worker free of attachment is in the mode of goodness, a worker blinded by personal desire is in the mode of passion, and a worker who has completely forgotten how to tell right from wrong is in the mode of ignorance. But a worker who has taken shelter of Me is understood to be transcendental to the modes of nature.
(Srimad Bhagavatam----11:25:26----translation).

Those who leave this world in the mode of goodness go to the heavenly planets, those who pass away in the mode of passion remain in the world of human beings, and those dying in the mode of ignorance must go to hell. But those who are free from the influence of all modes of nature come to Me.
(Srimad Bhagavatam----11:25:22----translation).

Work performed as an offering to Me, without consideration of the fruit, is considered to be in the mode of goodness. Work performed with a desire to enjoy the results is in the mode of passion. And work impelled by violence and envy is in the mode of ignorance.
(Srimad Bhagavatam----11:25:23----translation).

It should be understood that alert wakefulness comes from the mode of goodness, sleep with dreaming from the mode of passion, and deep, dreamless sleep from the mode of ignorance. The fourth state of consciousness pervades these three and is transcendental.
(Srimad Bhagavatam----11:25:20----translation).

Learned persons dedicated to Vedic culture are elevated by the mode of goodness to higher and higher positions. The mode of ignorance, on the other hand, forces one to fall headfirst into lower and lower births. And by the mode of passion one continues transmigrating through human bodies.
(Srimad Bhagavatam----11:25:21----translation).

When the mode of ignorance conquers passion and goodness, it covers one's consciousness and makes one foolish and dull. Falling into lamentation and illusion, a person in the mode of ignorance sleeps excessively, indulges in false hopes, and displays violence toward others.
(Srimad Bhagavatam----11:25:15----translation).

Mind and sense control, tolerance, discrimination, sticking to one's prescribed duty, truthfulness, mercy, careful study of the past and future, satisfaction in any condition, generosity, renunciation of sense gratification, faith in the spiritual master, being embarrassed at improper action, charity, simplicity, humbleness and satisfaction within oneself are qualities of the mode of goodness. Material desire, great endeavor, audacity, dissatisfaction even in gain, false pride, praying for material advancement, considering oneself different and better than others, sense gratification, rash eagerness to fight, a fondness for hearing oneself praised, the tendency to ridicule others, advertising one's own prowess and justifying one's actions by one's strength are qualities of the mode of passion. Intolerant anger, stinginess, speaking without scriptural authority, violent hatred, living as a parasite, hypocrisy, chronic fatigue, quarrel, lamentation, delusion, unhappiness, depression, sleeping too much, false expectations, fear and laziness constitute the major qualities of the mode of ignorance. Now please hear about the combination of these three modes.
(Srimad Bhagavatam----11:25:2-5----translation).

Made to wander because of his fruitive work, the conditioned soul, by contact with the mode of goodness, takes birth among the sages or demigods. By contact with the mode of passion he becomes a demon or human being, and by association with the mode of ignorance he takes birth as a ghost or in the animal kingdom.
(Srimad Bhagavatam----11:22:52----translation).