Believe whatever you want, but visualization ability is like every other aspect of human experience: it exists on a spectrum I can only visualize involuntarily

Believe whatever you want, but visualization ability is like every other aspect of human experience: it exists on a spectrum I can only visualize involuntarily as I'm drifting off to sleep, so I know what it is and what it's like. But I can't consciously do it, never have been able to, even with decades of deliberate practice.