As you work with natural energy and refine your abilities to effect change upon your environment, you will begin to recognize that idle wishes and spoken thought will seem to have more power invested in them.
Over the course of your journey, you have discovered that anything spoken with awareness and intent can be powerful. The more you learn, the more knowledge and experience you acquire as a spellcaster, the more power you bring to bear on your everyday life. Spellcasting trains you to create change at will, using the energy available to you. If you are careless, then the change you have not thought through can occur in response to your words and actions. As you’ve read, the spoken word is an important element in the “as above, so below” relationship representing bringing a though or desire, which exist on the mental plane, into manifestation on the material plane. The spoken word alone carries great power as a spell or as a technique to raise energy. The more experience you gain in this sort of application of energy the more you will develop your abilities, and your words will carry greater and greater significance.
You have heard it over and over, but with greater power come greater responsibility. Be aware of what you say, and how you say it. Make every word count both in spellcasting and in your daily life.