The most profound impact of Ketamine is it's effect on time. When becoming "emergent," time begins to slow to a shuddering, thugging crawl - each moment stretches out into a sea of infinity and rolls sluggishly into the next. Seconds become minutes, minutes become hours, and eventually, in the peak, time ceases to have any meaning whatsoever. One enters a state of "eternity". This is not an eternity in the classic sense - meaning "now" stretched on until the end of time - but "eternity" in the singular sense, when all branches of linear time bend in on themselves and collapse into a timeless and eternal state of simultaneous existence.
In "eternity" all events, actions, and interactions of the past, present, and future coexist simulteneously in one solid state. Not only can you see the "domino" cause and effect relationships between events which exist in close temporal and spacial proximity, you can also witness any event reverberating and iterating throughout the entireity of space and time. In "eternity" it becomes apparant that all events are simply shadows and echos of one massive primordial event or "proto event" which occured or occurs somewhere outside of linear time and 3-D space. It is not an event which occurs and ends - as we perceive events in linear time to do - but it is an "eternal" event, one which is constantly happening everywhere all the time which we are all a part of. Every action, event, sound, energy tranferrence, etc., are all just ripples of this singular event unfolding in a timeless, fractiline structure.