Trying to visually understand x, y, z axis this morning and ran across all of these very interesting videos;) Had to store them here so I can watch them over and over, plus share with you, of course.
High School Algebra was awhile back, but I was fascinated!
Matt Moore has some fun with the XYZ AXIS
I found this video highly entertaining! (larger version here)
Metatron's Cube! Video on Sacred Geometry are really wonderful!