how can 4th/5th/6th density negative entities exist without the veil?

[Patrick]

"...the service-to-self choice is one which denies the very center of the spectrum; that being universal love. Therefore, all that is built upon the penetration of the light of harvestable quality by such entities is based upon an omission. This omission shall manifest in fourth density as the love of self; that is, the fullest expression of the orange and yellow energy centers which then are used to potentiate communication and adepthood.

When fifth-density refinement has been achieved that which is not is carried further, the wisdom density being explored by entities which have no compassion, no universal love. They experience that which they wish by free choice, being of the earnest opinion that green-ray energy is folly." (B4,91)