This necessity, that if we wish to have abstract knowledge of space-relations (i.e., rational knowledge, not mere intuition or perception), space with its three dimensions must be translated into time which has only one dimension, this necessity it is, which makes mathematics so difficult.
Beharrezkotasun hori, espazioa bere hiru dimentsioekin denborara, dimentsio bakarra duen horretara itzuli behar izatea, baldin eta bere harremanen ezagutza abstraktu bat (hau da, jakite bat, ez begieste soil bat), beharrezkotasun hori da matematika hainbeste zailtzen duena.