"Regarding the tenability of gravitation as an impelling force, paralleled by the Cosmological Constant as a repelling force, a natural and complementary occurrence of this apparently incongruous ambiguity exists and prevails in the fact that omnidirectional electric field lines around a positive charge are directed away from the center of the charge; whereas, the field lines around a negative charge move inward, toward the center of the charge." - K.B. Robertson, p. 221, GRAVITY IS THE 4th DIMENSION, Copyright 1979.

A characteristic of the (reinstated) Cosmological Constant is that it's force increases with distance. It's application to the accelerating expansion of the spatial universe, corroborates this characteristic.

The increase of speed with distance can be demonstrated with an expanding yardstick, the more it expands, the faster its ends move away from each other.

This principle of accelerating expansion is also applicable to the expansion of matter - why gravity is acceleration.