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With regards to the original post. Gravity doesn't "pull" light. But it does warp space. Light travels unwaveringly in one direction in empty space. If the space fabric is distorded by a mass, the light will follow in suit. This I beleive is the cause of gravitational lensing.

I agree with Jarnold as well. We cannot feel gravity itself because it is not a force as much as a simple distortion of space-time. You feel pressure under your feet pinning you to the ground. This is what I beleive Jarnold means when he says obstructed gravity. Like it or not, you are always falling: only there is something solid continuously stopping you.

No physical body in space is at ever at rest, it is moving forward through the dimension of time. Along with gravity this constitutes the cosmological constant of the 20th century. It's the most amazing part about general relativity, yet few manage to understand it fully. Knowing the laws of general relativity top to bottom is nothing compared to actually grasping it's significance.

Ridiculed. Opposed. Accepted as self evident!

I enjoyed Brian Greene's explanaition of this in "The elegant universe".

Here is a link I found of interest.

http://www.outersecrets.com/real/2_motion.htm

Peace~