
HDG. AC BhaktiVedanta Swami Srila Prabhupada
Sa vai manah krsna-padaravindayor vacamsi vaikuntha-gunanuvarnane [SB 9.4.18].
You engage your senses. So this is practice. First of all think of the Deity. First of all think of the lotus feet, then the knees, then the eyes, then the belly, then the chest. In this way, as you become practiced, then go further, advance. In this way, when you become fully practiced, then automatically, in whatever condition you are, you will be able to meditate upon Krs