1. Casting a spell is an expression. All you have to do is express what you want. You can use pictures, feelings, anything.
A spell is the feeling of it.
It’s best to picture the end result of the spell, that way the pathway to make it happen is automatically figured out and it leaves less room for someone else to interfere with the spell. For example, if I want to have a nail in a wall, rather than picture the nail in smoothly, I should picture JUST the end part, where the nail IS in smoothly. This clearly expresses what I want with no ambiguity and no room for someone else to interfere with the spell, which they may do to cause it to fail.
2. Your subliminal wants emerge in your world. You are continually casting magic by your wants and desires.
A subtle trapping is to be harmed by fearing something so much that you just want it to get over it. For example, if you’re hammering a nail, you might fear hitting your thumb so badly that you “want” to hit it, just to avoid having to fear it any longer.
This sentiment can kill you however. To avoid feeling it, really think about what the bad outcome means, and what would happen if you DID hit your thumb.