The more in the now you are the more powerful your magic will be.
There are other things that will make it more powerful too. Basically anything that supports your belief that the magic will work will help make your magic work.
Right now the Now is important because when I live outside of it I really can’t type that much of anything. Sitting here with my fingers flying is only possible because I’m in the now. If I go into the future or the past I’ll start editing what I wrote and the amount of writing will decrease.
Reading what I just wrote is going into the past. Imagining how an invisible audience will perceive my words is going into the future. I have to stay between them. That is where the power is. That is where the message can be modified. That is where the mind can have its greatest impact on reality. Right now.