Result of touching the Supreme Lord

SB 8.4.6:
gajendro bhagavat-sparśād
vimukto 'jñāna-bandhanāt
prāpto bhagavato rūpaḿ
pīta-vāsāś catur-bhujaḥ

Because Gajendra, King of the elephants, had been touched directly by the hands of the Supreme Personality of Godhead, he was immediately freed of all material ignorance and bondage. Thus he received the salvation of sārūpya-mukti, in which he achieved the same bodily features as the Lord, being dressed in yellow garments and possessing four hands.

Purport: If one is favored by the Supreme Personality of Godhead by having his gross body touched by the Lord, his body turns into a spiritual body, and he can go back home, back to Godhead. Gajendra assumed a spiritual body when his body was touched by the Lord. Similarly, Dhruva Mahārāja assumed his spiritual body in this way. Arcanā-paddhati, daily worship of the Deity, provides an opportunity to touch the body of the Supreme Personality of Godhead, and thus it enables one to be fortunate enough to get a spiritual body and go back to Godhead. Not only by touching the body of the Supreme Lord, but simply by hearing about His pastimes, chanting His glories, touching His feet and offering worship — in other words, by serving the Lord somehow or other — one is purified of material contamination. This is the result of touching the Supreme Lord. One who is a pure devotee (anyābhilāṣitā-śūnyam [Bhakti-rasāmṛta-sindhu 1.1.11]), who acts according to the śāstra and the words of the Supreme Personality of Godhead, certainly becomes purified. Like Gajendra, he assumes a spiritual body and returns home, back to Godhead.

One who worships the deity must be non-envious

7.14.40:
Sometimes a neophyte devotee offers all the paraphernalia for worshiping the Lord, and he factually worships the Lord as the Deity, but because he is envious of the authorized devotees of Lord Viṣṇu, the Lord is never satisfied with his devotional service.

From the purport:
Deity worship is especially meant for purifying the neophyte devotees. Actually, however, preaching is more important. In Bhagavad-gītā (18.69) it is said, na ca tasmān manuṣyeṣu kaścin me priya-kṛttamaḥ: if one wants to be recognized by the Supreme Personality of Godhead, he must preach the glories of the Lord. One who worships the Deity must therefore be extremely respectful to preachers; otherwise simply worshiping the Deity will keep one in the lower stage of devotion.

Engagement in deity worship encourages respectful dealings between Vaishnavas

SB 7.14.39: My dear King, when great sages and saintly persons saw mutually disrespectful dealings at the beginning of Tretā-yuga, Deity worship in the temple was introduced with all paraphernalia.

From Srila Prabhupada's purport:

"A powerful Vaiṣṇava who has converted others into Vaiṣṇavas is to be worshiped, but because of material contamination, sometimes such an exalted Vaiṣṇava is disrespected by other, minor Vaiṣṇavas. When great saintly persons saw this contamination, they introduced worship of the Deity in the temple. This began in Tretā-yuga and was especially prominent in Dvāpara-yuga (dvāpare paricaryāyāḿ). "

"A prākṛta devotee, or neophyte devotee, is still on the material platform. He certainly engages in worshiping the Deity, but he cannot appreciate the activities of a pure devotee. It has actually been seen that even an authorized devotee who is engaged in the service of the Lord by preaching the mission of Kṛṣṇa consciousness is sometimes criticized by neophyte devotees. Such neophytes are described by Viśvanātha Cakravartī Ṭhākura: sarva-prāṇi-sammānanāsamarthānām avajñā spardhādimatāḿ tu bhagavat-pratimaiva pātram ity āha. For those who cannot properly appreciate the activities of authorized devotees, Deity worship is the only way for spiritual advancement. In the Caitanya-caritāmṛta (Antya 7.11) it is clearly said, kṛṣṇa-śakti vinā nahe tāra pravartana: without being authorized by Kṛṣṇa, one cannot preach the holy name of the Lord throughout the entire world. Nevertheless, a devotee who does so is criticized by neophyte devotees, kaniṣṭha-adhikārīs, who are on the lower stages of devotional service. For them, Deity worship is strongly recommended."

Lord's darshan removes all material contaminations

6.16.31 Text:As soon as Mahārāja Citraketu saw the Supreme Lord, he was cleansed of all material contamination and situated in his original Kṛṣṇa consciousness, being completely purified. He became silent and grave, and because of love for the Lord, tears fell from his eyes, and his hairs stood on end. With great devotion and love, he offered his respectful obeisances unto the original Personality of Godhead.

6.16.31 Purport:The word tad-darśana-dhvasta-samasta-kilbiṣaḥ is very important in this verse. If one regularly sees the Supreme Personality of Godhead in the temple, one will gradually be disinfected of all material desires simply by visiting the temple and seeing the Deity. When one is freed from all the results of sinful activities, one will be purified, and with a healthy mind, completely cleansed, he will increasingly make progress in Kṛṣṇa consciousness.

6.16.44 Text: My Lord, it is not impossible for one to be immediately freed from all material contamination by seeing You. Not to speak of seeing You personally, merely by hearing the holy name of Your Lordship only once, even caṇḍālas, men of the lowest class, are freed from all material contamination. Under the circumstances, who will not be freed from material contamination simply by seeing You?
6.16.45 Text:Therefore, my dear Lord, simply seeing You has now wiped away all the contamination of sinful activities and their results of material attachment and lusty desires, which always filled my mind and the core of my heart. Whatever is predicted by the great sage Nārada Muni cannot be otherwise. In other words, I have obtained Your audience as a result of being trained by Nārada Muni.
6.16.45 Purport excerpt : As soon as one sees the Supreme Personality of Godhead, all the sinful reactions in the core of one's heart are certainly vanquished.