Bhaya means fearfulness, and krodha means anger. Because we are attached to the material enjoyment, we are also very much always fearful how our enjoyment may not be disturbed. And if our material enjoyment is not fulfilled, we become angry. This is our position on account of this material body. Therefore spiritual culture means how to get out of this attachment, fearfulness and the position of becoming angry.
(Lecture on Bhagavad-Gita--4:10--Public Meeting--Rome--25th. May, 1974).

From quarrel arises intolerable anger, followed by the darkness of ignorance. This ignorance quickly overtakes a man's broad intelligence.
(Srimad Bhagavatam--11:21:20--translation).

One must have disciplinary training in controlling speaking, anger, the tongue, the mind, the belly and the genitals.
(Srimad Bhagavatam--2:9:43--purport).

One may be very learned in the mundane estimation, but that does not mean that he is free from all low activities of lust and anger. Good qualifications can be expected only from a pure devotee, who is always engaged in the thought of the Lord, or in samādhi, with faith. (Srimad Bhagavatam--3:12:26--purport).

Both lust and anger stand on the platform of the mode of passion. Lust is actually the product of the mode of passion, and in the absence of satisfaction of lust, the same desire transforms into anger on the platform of ignorance. When ignorance covers the soul, it is the source of his degradation to the most abominable condition of hellish life.
(Srimad Bhagavatam--3:31:29--purport).

As soon as the concoctions of material enjoyment are there, because of our association we create a sort of lust or eagerness to enjoy them, and when that false enjoyment does not actually make us happy, we create another illusion, known as anger, and by the manifestation of anger, the illusion becomes stronger.
(Srimad Bhagavatam--4:22:14--purport).

There is an English proverb that says, "The face is the index of the mind." If one is angry, his anger is immediately expressed in his face. Similarly, other mental states are reflected by the actions of the gross body. In other words, the activities of the gross body are reactions of the mental condition. The mind's activities are thinking, feeling and willing. The willing portion of the mind is manifest by the activities of the body. The conclusion is that by the activities of the body and senses, we can understand the condition of the mind.

(Srimad Bhagavatam--4:29:63--purport).

The condition of the mind is affected by past activities in the past body. When the mind is joined with a particular sense, it immediately becomes manifest in a certain way. For instance, when there is anger in the mind, the tongue vibrates so many maledictions. Similarly, when the mind's anger is expressed through the hand, there is fighting. When it is expressed through the leg, there is kicking.
(Srimad Bhagavatam--4:29:63--purport).

An unchaste wife can kill her husband at any time, and an uncontrolled mind, followed by lust, anger, greed, madness, envy and illusion, can certainly kill the yogī.
(Srimad Bhagavatam- 5:6:4--purport).

The mind is the root cause of lust, anger, pride, greed, lamentation, illusion and fear. Combined, these constitute bondage to fruitive activity. What learned man would put faith in the mind?
(Srimad Bhagavatam--5:6:5--translation).

The mind is the original cause of material bondage. It is followed by many enemies, such as anger, pride, greed, lamentation, illusion and fear.
(Srimad Bhagavatam--5:6:5--purport).

By engaging one in devotional service, the Kṛṣṇa consciousness movement keeps one always transcendental to anger, greed, lust, envy and so forth. One must perform devotional service because otherwise one will become victimized by the modes of material nature.
(Srimad Bhagavatam--6:4:14--purport).