Whether this law acts as the chemical affinity of apparently unconscious atoms, or in the instinctive, if unreasoned, attractions of the vegetable and animal worlds, it is still the principle of selective affinity; and it continues to be the same when it passes on into the higher kingdoms which are ruled by reason and conscious purpose. The modes of activity in each of these kingdoms are dictated by the nature of the kingdom; but the activity itself always results from the preference of a certain subject for a certain object, to the exclusion of all others; and all action consists in the reciprocal movement of the two towards each other in obedience to the law of their affinity.
Think of yourself as a huge magnet. The kind that pulls metal to itself from afar off. It doesn’t “try” to attract, it simply does attract. It is the same way for us. Whether or not we are trying to attract, we are doing so all the time. Even when we are asleep. And we attract the likeness of what we think about. If we are thinking about a lack of something, we are attracting more lack (scarcity). If we are thinking about something we love, we are attracting more of what we love and enjoy. I know it sounds incredibly simple, and it is.