“The process of meditation recommended in the Shrimad-Bhagavatam is not to fix one's attention on something impersonal or void. The meditation should concentrate on the person of the Supreme Godhead, either in His virat-rupa, the gigantic universal form, or in His sach-chid-ananda-vigraha [Bs. 5.1], as described in the scriptures. There are authorized descriptions of Vishnu forms, and there are authorized representations of Deities in the temples. Thus one can practice meditating upon the Deity, concentrating his mind on the lotus feet of the Lord and gradually rising higher and higher, up to His smiling face.” (Shrila Prabhupada, Shrimad Bhagavatam, 2.2.13 Purport)