While an individual spell affects the weave of magic in the same way, the means a wizard uses to understand the spell varies. It’s as if the spell is a note played by strumming the magic strung in the air, but every wizard builds their own instrument and invents their own musical notation. You’ve been studying this spell so long you’re sweating with the intense intellectual effort, but now you think you have enough of an understanding to transcribe it using your own systems.