Srila Prabhupada Letter to Madhusudana, 1st February 1968

“Yes, the verse concerning arca-vigraha is like this: arcye visnau sila-dhir gurusu, nara-matir vaisnave jati-buddhir. The meaning is that one should not think of the Deity as made of stone, wood, etc. Another verses is: arcayam eva haraye, pujam yah sraddhayehate. The meaning is that one who worships the Deity with great devotion but doesn't show any devotion to the devotees of the Lord, or doesn't preach Krsna consciousness for the benefit of the general public, he is in the lower stage of devotional service.”