Is everything subjective?

[Tenet Nosce]

Is it a rare thing to actually feel and experience the oneness with everything?

Yes, I think so, GW. According to my read of the material, one of the big "points" of this density is to learn to "act as if" we are all connected, even though we do not directly perceive it. This is the foundation of the quality known as faith.

Also- have you considered- the more you "try" to perceive Oneness, the further you push yourself away from the actual experience?