Negation words - such as no, not, never, aren't, wasn't, etc. - are words that negate something else in a sentence.

If I say, "I do not want to smoke." my conscious mind understands that to mean that there is a lack of desire to smoke. But the subconscious mind does not understand or register negations, and so it, presented with the very same statement, understands "I do want to smoke."

It is for this reason and others like it that scripting subliminals is not as straight forward as you might think. The results of using such a statement in a subliminal would be a reversal of what was desired.

It is quite common for people who don't know what they are doing to use negations in their subliminal scripts, and then they wonder why they don't get the results they want. This is why. You have to understand how the subconscious mind thinks, understands things, processes information and responds, not the conscious mind, because subliminals bypass the subconscious mind completely.

Home made subliminals, and subliminals made by un(der)educated people commonly have such scripting errors, and the result is a program that is capable of triggering self conflicting results, reversals, or other unexpected results.

The keys to scripting a subliminal safely are not obvious. It is therefore best to rely on an experienced and established expert for your subliminals.