Ability, as it is found in living centers of awareness, is subject to as many variables as physical elements are. You don't use uncoated steel for marine environment structures for good reason; the chemistry alone is harsh enough to reduce it to uselessness in short order.

Ability can be corroded, in a roughly parallel vein, depending on the owner. Some of the radical elements which could be said to corrode ability are those that can found in any grade school -- harsh, challengining invalidative remarks, emotional abuse, the pressure to subscribe to really stupid realities or be outcast from the tribe, physical fear and threats, and so on.

But much more important than those are the things we ikmpose on ourselves. Beings seek to be, as best as they can, "good" at all times, even when they are so swamped with confusions and traumatic overlays that they can no longer see what it is. When they fail, that is when they perceive that they have done something that is more harmful than it is good (either because they have or because they have been persuaded this is the case) they tend to pull back from the people, groups or areas in the world where they feel they have done bad. A typical pattern is the moocher or sponge who comes and lives on you for a month without regard for exchange and then starts discvovering that he can't associate iwth you anymore, has to leave and discovers how bad you are and never commmunicates again.

One of the thing that leaves people "psychically" blinbd is shutting down their own perceptions because of this tendency to pull away from connecting with two many spots where harm has been done. This is why it sometimes happens that you see "miraculous" benefits from confession -- just getting over the obsession to withold all by itself relieves strain and improves ability.

Don't get jme wrong, this is not the only factor that can contribute tot he underminiing of ability.

Abilities such as seeing remotely or knowing before the event are potentially things anyone can do; but obsessive agreements on limitation, or calculations of self-effacement, or automatic mechanisms of "being normal and rational" tend to suffocate the perception of them. ANd while itmay not work quite this way in the physical framework, it is pretty normal in the realm of the self that when you really decide you cannot see something it turns black pretty quick.

A