Respect is to consider worthy of high regard and has nothing to do with fear or intimidation. Though closely intertwined, it differs from trust in that it helps define the relationship within the herd. Trust gives the horse confidence to act, respect motivates him to. Communication, as defined by Webster, is a process by which information is exchanged through a common system of symbols, signs or behavior. It is incumbent upon us to learn his language, and not expect him to learn ours.
Many people believe the horse moves away from pressure.
If that were true, try to pull one's head down that hasn't been taught to lower it, or push him off a toe when he's standing on it. The horse doesn't actually learn to move away from pressure, he learns to seek a release. This is where feel, timing, and balance become critical. Timing the release tells the horse when he has responded correctly. Balance keeps us in position to feel the horse respond, and time the release.