Conv june 23 1976 NVRN
Devotee (4): The difficulty is that we cannot understand, we cannot feel what pleases Kṛṣṇa now, yet we can feel what pleases us, and that is the difficulty?
Prabhupāda: You have no feeling, that everyone knows. Therefore you have to carry out the order of spiritual master, that's all.
Devotee (1) : If we try to please Kṛṣṇa with all of our service and activities, that automatically brings pleasure to the self?
Prabhupāda: You cannot please Kṛṣṇa directly. You please your spiritual master, Kṛṣṇa will be pleased. If you want to please directly Kṛṣṇa, that is not possible. That is concoction You cannot please. Yasya prasādād bhagavat-prasādaḥ **.
You have to please your spiritual master, then Kṛṣṇa will be pleased. 

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Bombay Dec 4 1974 lecture

Somebody was talking that "Your Deity is just like trying to talk with me." Prasanna-vaktra Yes. He is here to talk with you, but He is waiting whether you're interested to talk with Him. That's all. Kṛṣṇa says that teṣāṁ satata-yuktānāṁ bhajatāṁ prti-pūrvakam, bddhi-yogaṁ adāmi tam [Bg. 10.10]. He talks, but with whom? Teṣāṁsatata-yuktānām. One who is twenty-four hours engaged with love and faith in the service of the Lord. To whom? Just like if you want to talk with some big man, then you must have qualification. Is it possible that if you want to talkwith the big man here, immediately you like? No. You cannot talk. Youmust be fit to talkwith him. Similarly,Kṛṣṇa is ready to talk with you. He has come. He has descended in arcā-mūrti to talk with you, to be visible by you. Now you make yourself ready and fit to talk with Kṛṣṇa. Then He will exchange conversation. Santaḥ sadaiva hṛdayeṣu vilokayanti. This is possible.

Lecture NY sept 18 1966
So in my childhood, when I was five or six years old, I requested my father that "Father, give me this Deity. I shall worship." So father purchased for me little Krishna, Radha, and he gave me, and I was imitating. Whatever foodstuff I was getting, I was offering to Krishna and eating. In this way I got my life developed. And there was a temple in our neighbourhood.So I was seeing the Krishna deity. Oh, I was thinking.....I still remember. I was standing for hours together. 

SB 4.30.27 Purport-The form of the Lord as worshiped in the temples is called arca-vigraha or arcāvatāra, the worshipable form, the Deity incarnation. This facility is offered to neophyte devoteesso that they can see the real form of the Lord face to face and offer their respectful obeisances and sacrifices in the form of arcā.Through such facilities the neophytes gradually invoke their original Kṛṣṇaconsciousness. Deity worship in the form of temple worship is the most valuable benediction given by the Lord to beginners. All neophytes must therefore engage in the worship of the Lord by keeping the arcā-vigraha (arcāvatāra) at home or in the temple.

                                          "OF SEASONS I AM FLOWER BEARING SPRING"....
Compiled by Damaghosa das