The Glathrielian imperative was essentially quite simple: At all times, consider only all the things that are relevant to you, and miss not a one of those. Anything irrelevant or unnecessary was a distraction; distraction was the way to destruction, so anything unimportant must be literally factored out of the mind and not even allowed to register. It would take years of self-training to master it completely, but Terry, helped by the experience and self-training of the Glathrielian elders, had achieved an amazingly high level of mastery in so short a time.

If she could filter out all distractions, all things not directly relevant to her existence and what was of true importance to her, and automatically observe only what she needed, the amount of information that simply came to her was enormous, far beyond the sort of knowledge others might possess. Thoughts, actions, and processes that did not require decisions should be automated so that they, too, ceased to exist as a factor. The energy field that her brain could generate and her body could use for so many things was one such process she had already relegated to that status. Although she didn’t know or care exactly what it was doing, or how, it protected her from the elements that might cause distraction—extremes of heat and cold, for example, or even adjusting gravitation or filtering out any impurities from an atmosphere so that if the chemicals needed to breathe were present in any mixture, it would extract only those and allow them into her lungs.

Of course, it was also useful both as a defense and as an offense, if needed, and those functions, too, were automated.

Without even realizing she had done so, she had reordered much of her digestive system and metabolism for maximum efficiency and maximum reserves of power.