Thought shield

A "Thought Shield", also sometimes called a "Mental Shield" was a technique used by Force users, and telepathics, in order to keep there thoughts, emotions, and motives secret from others. It was taught from the earliest age, to Padawans, Apprentices, and sometimes even diplomats, in order to keep there thoughts from being read. In battle, this was crucial as an enemy would be able to know what would happen before it happened against an unshielded opponent. In diplomats, it was taught as an Empathic person might pick up there true motives of there visit. Apparently, all that was involved in the shield was a strong, mental will, and the ability to concentrate for long periods of time, this being the case, it was not uncommon for non force users to learn it as well. Eventually, this concentration would become second nature, Subconscious. By focussing, a being could raise and lower the shield as they saw fit, but usually it was kept raised.