Attachment means accepting things for one's own sense gratification, and detachment is the absence of such sensual attachment. But one fixed in Kṛṣṇa consciousness has neither attachment nor detachment because his life is dedicated in the service of the Lord. Consequently he is not at all angry even when his attempts are unsuccessful. Success or no success, a Kṛṣṇa conscious person is always steady in his determination.
(Bhagavad-Gita--2:56--purport).

The Kṛṣṇa conscious person is concerned only with the satisfaction of Kṛṣṇa, and nothing else. Therefore he is transcendental to all attachment and detachment.
(Bhagavad-Gita--2:64--purport).

The whole purpose of detachment from all kinds of sense attachment is ultimately to become situated on the platform of Kṛṣṇa consciousness.
(Bhagavad-Gita--3:34--purport).

The principles of knowledge and detachment are two important factors on the path of transcendental realization. The whole spiritual process leads to perfect knowledge of everything material and spiritual, and the results of such perfect knowledge are that one becomes detached from material affection and becomes attached to spiritual activities.
(Srimad Bhagavatam--1:2:7--purport).

Our intelligence in the present conditioned state of life is impure due to being engaged in sense gratification. The result of meditation on the transcendental form of the Lord will be manifested by one's detachment from sense gratification. Therefore, the ultimate purpose of meditation is purification of one's intelligence.
Srimad Bhagavatam--2:2:13---purport).

As soon as one engages in such serious devotional service of the Lord, naturally the propensity to falsely claim lordship over material nature disappears. Thatdetachment is called vairāgya. Instead of being absorbed in so-called material lordship, one engages in Kṛṣṇa consciousness; that is control of consciousness.
(Srimad Bhagavatam---3:27:5--purport).

The significance of advancement in transcendental knowledge and detachment from material attraction is exhibited in the personality of a highly advanced devotee. For him there is nothing agreeable or disagreeable because he does not act in any way for his personal sense gratification.
(Srimad Bhagavatam--3:32:24--purport).