Everything

There’s a reason the phrase spellbinding exists. Long before Velcro, buttons, or carabiners, people had to tie or weave things together. Because the principle of contagion focuses on connecting spells, subjects, and casters by a single strand, knots and ropes (as well as thongs, strings, threads, and so forth) feature heavily in spells. The metaphorical Tapestry and the concept of string-theory physics both draw upon that connection, and so the acts of binding things together, weaving intentions with materials, and undoing knots to release their energy all serve practical as well as symbolic purposes in magick. And once you understand that fact, you see deeper significance in Celtic knotwork, knitting, the arcane arts of rope bondage, and the pervasive imagery of mystic spiders and Pattern Webs.