As a child, my parents told me that visualizing what I wanted would draw that thing or experience or person to me. This has worked, to varying degrees, throughout my life. But I didn’t just say, "I guess it only works sometimes" and accept that reality. (That's not what someone who believes in the power of manifesting would do, after all.)
Instead, I worked to identify the common factors between my unsuccessful attempts at manifestation. I discovered that if I focused more on the negative feelings — "I don't have this thing I want" — rather than fully committing to the belief in a future in which I did have that thing, the outcome I was pursuing never came to fruition.
Hungry to understand the mechanics of manifestation and enrich my own practice, I started exploring the science of visualization, and have continued for years.