In the 1899 interview, Nikola Tesla said that and I quote

In the 1899 interview, Nikola Tesla said that and I quote:

"Everything is the Light, I am part of a light, and it is the music. The Light fills my six senses: I see it, hear, feel, smell, touch and think. Thinking of it means my sixth sense. Particles of Light are written note”.

He also goes on to say that "Light is the primary source of Creation, in one its ray is the fate of nations, each nation has its own ray in what great light source we see as the Sun."

Imagine this was back when science at that time couldn't even begin to understand the atomic level of particles, let alone the sub-atomic levels.