How we express something (our wording) is important

With every sound we produce, we send a wave of energy into our surrounding reality that helps create that same reality and by extension our World.
With every sentence we utter we influence our finances, our health, our relationships, etc....
A story I once read somewhere illustrates this tellingly.
A woman had developed an incurable eye disease.
This condition was rapidly causing her to be in danger of going blind.
The ophthalmologists she consulted all came to the same conclusion, there was no cure or healing possible.
In desperation, she began to seek alternative therapies.

On the advice of a good friend, she ended up with a crystal therapist.
She thought the idea sounded absurd, but decided to give it a chance, as she had nothing to lose.
During the session, the therapist in question first asked her to describe herself and her life.
After about ten minutes, he interrupted her asking if she was aware that during those ten minutes she had uttered the words "I hate" at least fifteen times.
Sentences such as "I hate how the World is evolving" and "I hate how children are treated at school" and "I hate standing in traffic jams every day" were constantly formulated by her. The Lady in question was completely unaware of this and has since changed her word usage drastically.
Now, years later, she has perfect eyesight...

Often, without thinking about it, we use words that we repeat a lot such as "in my last email" or even "during our last conversation" etc....
Of course, we do not mean that it is or will be our last email or our last conversation, rather we mean our 'most recently sent email' or our 'most recent conversation', our 'most recent received email' etc....
Similarly, the common word choice 'I am...' as in 'I am sick', 'I am nauseous', 'I am tired'.
After all, this defines who you are.
We can easily replace this, given some practice and thoughtfulness,
'I feel...', a world of difference and a transient state of a snapshot. 'I am happy', 'I am happy', 'I am healthy' is of course ok to pronounce, the more the merrier even.

As I said, when you say 'I am' you thereby define your whole being, every cell of your being, your mind, your personality, this both on a conscious and subconscious level.
Another important aspect of our use of words is the law of focus.
Where Focus Goes, Energy Flows (T. Robbins): that which we focus our attention on is what we create and where our energy flows. It is infinitely more important that we focus on the positive we want to achieve instead of the negative we want to avoid.
An example: do not focus on 'not aging fast', this will definitely make you age at a fast rate! Rather, direct your focus on 'staying healthy, youthful and vibrant'.
Another thing often overlooked in word choice is negations.
Words like 'limitless', 'unlimited', 'unbounded' and similar actually cause the subconscious to focus on boundaries and limitations. For example, the words 'boundless abundance' cause limitation of abundance. 'Effortless' can be replaced by 'easy', etc...

Suppose you want to sell your house 'effortlessly and without problems', guess how the sale will go... right, with a lot of effort and trouble!
So imagine in your visualization that the sale will be smooth, easy and pleasant.
Always review your affirmations, see what you are saying to yourself and feel/hear how it sounds.
I myself omitted the word effortless from my affirmation when I put my apartment up for sale, it sold within the following week....
In Alfa we find a handy tool for this as well, just tilt the eyes at a 35º angle, bring the three fingertips together and say: 'cancel, cancel, and so it is!'.

Similarly, for example in Ho'oponopono, an ancient and powerful Hawaiian spiritual cleansing ritual, use is made of the power of the spoken word. In summary, the key words (read: nouns, conjunctions, adjectives etc...) we use matter, the Universe does not recognize negations or affirmations, so so-called 'adverbials' or 'adverbs' like none, yes or no, maybe, probably etc... are thus irrelevant and best omitted from affirmations.