Le Sefer Yesirah noma Book of Creation indzabambhalo yetinkhulumo yetinkinga te cosmology kanye ne cosmogony. Lo mbhalo owabhalwa cishe phakathi kwekhulu lesithathu nelesithupha, ungomunye wemibhalo emidala yokuqagela ekhona ngesiHeberu. Ukuzindla okuyimfihlakalo kubukeka sengathi bekungomunye wemithombo lapho umlobi aphefumulelwa khona. Isihloko sayo esiyinhloko yizinto zomhlaba ezitholakala ezinombolweni eziyishumi zokuqala nezinkulu, iSephiroth, njengoba le ncwadi ibabiza kanjalo, nezinhlamvu ezingamashumi amabili nambili zama-alfabhethi esiHeberu. Konke lokhu ndawonye kumelela amandla angaqondakaliyo ukuhlangana kwawo okhiqize inhlanganisela eyahlukahlukene engabonakala kuyo yonke indalo, ayizindlela "ezingamashumi amathathu nambili zokuhlakanipha", uNkulunkulu adala ngazo konke lokho khona.