18/9 is about the balance between materialism and the spiritual ideal. Unfortunately, most often the former is more recognized. In either case, wherever the 18 shows up in a chart, it is destined to be an active part in one’s life. Hyperactivity and/or hypersensitivity may be a problem. They may also be dreamers who have a hard time accepting reality as it is and prefer to do nothing. It is important to watch your health, as those with this number may have fragile health concerns. In the occult, the number 18 is often linked with war and destruction. Those with this number will need strong faith in all areas to succeed. Depending on the orientation, it can bring possessiveness or detachment to material things.
The 1 which is about self initiative, independence and original ideas is embracing the 8, which is about taking those ideas and either implementing or discarding them. This results in evolution or destruction. Obviously, analysis is required in order to ensure that the ideas are fool-proof and will benefit the world for a better cause. This is where the -7 comes in. This number can easily see life wearing rosy-colored glasses, refusing to look deep down and realizing the truth of such things. Such realities will only break in the end and cause the suffering -7 is known for. But it is all to gain a better perspective of the world around us, as the +9 tells. Much wisdom will be gained through your experiences as long as you have the eye to see them. It is important to keep an eye on your health at all times. If it remains possessive to something then it can compound to dysfunction and illness unless it is released.