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

A living being cannot be vacant of desires. He is not a dead stone. He must be working, thinking, feeling and willing. But when he thinks, feels and wills materially, he becomes entangled, and conversely when he thinks, feels and wills for the service of the Lord, he becomes gradually freed from all entanglement.
(Srimad Bhagavatam---1:6:22---purport).

The living entity misunderstands himself to be a material product. This means that the present perverted way of thinking, feeling and willing, under material conditions, is not natural for him. But he has his normal way of thinking, feeling and willing. The living being in his original state is not without thinking, willing and feeling power.
(Srimad Bhagavatam---1:7:5---purport).

The mind is the pivot of the active sense organs, and as such if the quality of thinking, feeling and willing is changed, naturally the quality of actions by the instrumental senses will also change.
(Srimad Bhagavatam---2:1:17---purport).

The subtle presence of the Lord is felt by the intelligent man who can study the psychic effects of thinking, feeling and willing.
(Srimad Bhagavatam---2:5:17---purport).

The individual soul knows about his own thinking, feeling and willing activities, but the Supersoul, or the Paramātmā, the supreme controller, being present everywhere, knows everyone's thinking, feeling and willing activities.
(Srimad Bhagavatam---2:6:21---purport).

Mental activities, or psychological actions of thinking, feeling and willing, are also activities on the platform of ethereal existence. The statement in Bhagavad-gītā that the mental situation at the time of death is the basis of the next birth is also corroborated in this verse. Mental existence transforms into tangible form as soon as there is an opportunity due to contamination or development of the gross elements from subtle form.
(Srimad Bhagavatam---3:26:34---purport).

When one is in goodness, he feels happiness; when one is in passion, he feels satisfaction through material enjoyment; and when one is in darkness, he feels bewilderment. All these activities are of the mind, and they function on the platform of thinking, feeling and willing.
(Srimad Bhagavatam----4:25:55---purport).

A sane man should consult his mind, its thinking, feeling and willing processes, and decide how these processes should be utilized. If one always thinks of Kṛṣṇa, feels how to serve Him and wills to execute the order of Kṛṣṇa, it should be known that he has taken good instruction from his intelligence, which is called the mother.
(Srimad Bhagavatam--4:26:14---purport).

The transmigration of the soul is caused by the subtle body, which is the storehouse of all kinds of material desires. Unless one is fully absorbed in Kṛṣṇa consciousness, material desires will come and go. That is the nature of the mind—thinking, feeling and willing.
(Srimad Bhagavatam---4:29:68---purport).

According to these modes, the living entity gets the opportunity to perform different types of karma with different types of knowledge, thinking, feeling and willing. Thus the bodily machine begins to work.
(Srimad Bhagavatam---7:7:22---purport).

One must understand that the process of mental speculation develops a new type of body that does not actually exist. If one can understand the nature of the mind (manorathena) and its thinking, feeling and willing, one can very easily understand how from the mind different types of bodies develop.
(Srimad Bhagavatam---10:1:41---purport).

One can very easily understand that the mind is constantly flickering, changing in the quality of its thinking, feeling and willing.
(Srimad Bhagavatam---10:1:42---purport).

The subtle activities of the mind are thinking, feeling and willing, which are carried out according to one's consciousness, either polluted or clear.
(Sri Caitanya Caritamrta-preface).

The mind's activities are thinking, feeling and willing, by which the mind accepts materially favorable things and rejects the unfavorable. This is the consciousness of people in general.
(Sri Caitanya Caritamrta---2:13:137---purport).

If a person is to be free of material things, his mind cannot be vacant; there must be subject matters for thinking, feeling and willing. Unless one's mind is filled with thoughts of Kṛṣṇa, feelings for Kṛṣṇa and a desire to serve Kṛṣṇa, the mind will be filled with material activities.
(Sri Caitanya Caritamrta---2:13:138---purport).

Those who are cultivating spiritual life and executing devotional service are always engaged in activity. Such activity can be performed with the body or with the mind. Thinking, feeling and willing are all activities of the mind, and when we will to do something, the activity comes to be manifest by the gross bodily senses.
(Nectar of Devotion).

Some of the senses are meant for acquiring knowledge, and some are meant for executing the conclusions of our thinking, feeling and willing. So practice means employing both the mind and the senses in practical devotional service.
(Nectar of Devotion).

The mind is nothing but the energy of Kṛṣṇa. Actually, any person who can think, feel and will cannot be separated from Kṛṣṇa. But the stage in which he can understand his eternal relationship with Kṛṣṇa is called Kṛṣṇa consciousness.
(Krsna Book).

Everything that exists in the world is neither an object of happiness nor an object of distress; everything is simply subjective—that is, subject to our sense perceptions as they relate to our processes of thinking, feeling, and willing.
(Message of Godhead).

Such temporary sensations of happiness and distress, pertaining to the act of thinking, feeling, and willing under a false ego, are eternally different from the spirit soul and are therefore "unreal reality."
(Message of Godhead).