By the pen, and what they write [68:1]
The science behind Islamic calligraphy
When done properly, Islamic calligraphy is a science as much as it is an art form. Each letter in each script has been mastered over for generations so that it is in the most perfect proportions determined by sacred geometry. After a few hours of viewing calligraphy, it is easy to differentiate the self-taught calligrapher versus the calligrapher who has perfected the artform under a master.