Apparency is the degree to which something is apparent from your present perspective. The more attention you give to anything, the more apparent it becomes in your reality. For instance, the more you think about how much you love someone, the more apparent your love for them becomes, the more your life revolves around your love for them, and the more your experiences involve you loving them. If you give your attention to them being happy instead though, the more your experiences will then involve them being happy.
The more you give your attention to the type of life experiences you want to live, the more your life experiences will involve the type of experiences you want to live. For this reason, you can use the law of apparency to your advantage by giving more of your attention to your desires. With each thought you think about your desires, your desires will become increasingly apparent in your life experience.