There are different types of material opulence, known technically as bhukti, mukti and siddhi. Bhukti refers to being situated in a very good position, like a position with the demigods in the higher planetary systems, where one can enjoy material sense gratification to the greatest extent. Mukti refers to being disgusted with material advancement and thus desiring to become one with the Supreme. Siddhi refers to executing a severe type of meditation, like that of the yogīs, to attain eight kinds of perfection (aṇimā, laghimā, mahimā, etc.). All who desire some material advancement through bhukti, mukti or siddhi are punishable in due course of time, and they return to material activities. Prahlāda Mahārāja rejected them all; he simply wanted to engage as an apprentice under the guidance of a pure devotee.
(Srimad Bhagavatam----7:9:24---purport).

Mukti means liberation and merging into the impersonal Brahman effulgence.
(Sri Caitanya Caritamrta----2:6:261----purport).

Mukti means to be reinstated in one's original spiritual status after giving up the material conception of life.
(Srimad Bhagavatam----1:8:4---- purport).

Mukti, means getting relief from these constant anxieties.
(Srimad Bhagavatam----1:12:28---- purport).

Mukti, or liberation, means becoming free from the results of fruitive activities. As stated in Śrīmad-Bhāgavatam (2.10.6): muktir hitvānyathā-rūpam. Mukti meansgiving up all other activities and being situated in one's constitutional position (svarupeṇa vyavasthitiḥ). In this conditional state, we are entangled by one fruitive activity after another. Karma-bandhana means "the bonds of fruitive activity." As long as one's mind is absorbed in fruitive activities, he has to manufacture plans for happiness. The bhakti-yoga process is different, for bhakti-yoga means acting according to the order of the supreme authority. When we act under the direction of supreme authority, we do not become entangled by fruitive results.
(Srimad Bhagavatam----4:24:78---- purport).

Devotional service unto the Lord is the highest attainment for anyone desiring liberation from the tribulations of material existence. As stated in Bhagavad-gītā (6.22), yaṁ labdhvā cāparaṁ lābhaṁ manyate nādhikaṁ tataḥ: "Gaining this, one thinks there is no greater gain." When one attains the service of the Lord, which is non-different from the Lord, one does not desire anything material. Mukti means relief from material existence. Bilvamaṅgala Ṭhākura says: muktiḥ mukulitāñjaliḥ sevate 'smān. For a devotee, mukti is not a very great achievement. Mukti means being situated in one's constitutional position. The constitutional position of every living being is that of the Lord's servant; therefore when a living entity is engaged in the Lord's loving service, he has already attained mukti. Consequently a devotee does not aspire for mukti, even if it is offered by the Supreme Lord Himself.
(Srimad Bhagavatam----5:6:17---- purport).

Mukti means liberation from material contamination; when liberated, one does not have to take birth again in the material world. The impersonalists desire to merge into the spiritual existence, to end their individual existence, but according to Śrīmad-Bhāgavatam, mukti is only the beginning of one's becoming situated in his normal condition. The normal condition of every living entity is to be engaged in the devotional service of the Lord. From the statement of the Ādi Purāṇa it appears that a devotee is satisfied simply with being engaged in devotional service. He does not aspire for any liberation from material, conditional life. In other words, anyone who is engaged in devotional service is not in the material condition of life, although he may appear so.
(Nectar of Devotion).