There is no experience of a world as such; there’s just the experience of a perception—a sight, a sound, a flavor, a scent, a texture. 

The experience of a sight–to take but one example–doesn’t reveal “a background world” from which it appeared. It just reveals the simple fact of seeing arising.

Seeing arising, however, could never appear without some process of seeing. Take away the experience, or process, of seeing and where is the experience of seeing arising? It’s nowhere to be found.

But then the process of seeing and seeing arising aren’t two experiences; they’re just two different names for the same seamless experience.

Go further: can seeing or seeing arising appear in the absence of time? Of course not! How could there be an arising without time?

Then what is time? Time is just a concept, a thought—call it a “subtle thought.” The condition for seeing arising, being time, tells us that seeing arising is “of the mind” or “of mind stuff.” 

In which case, we can say—loosely—that “the world (which is perception, which is only (e.g.) seeing arising—is just a thought.” No mind, no world appearance.

And what is the nature (svarupa) of this thought or of this thought-seeing-in-time-arising? Its nature is nothing but Consciousness.

Therefore, there is, in fact, no world. There never was a world, and there will never be a world. There’s only, in the final analysis, Consciousness. Know this.