The view that the language one speaks affects or determines how you see the world, most famously expounded in the writings of Benjamin Lee Whorf in the 1930s and 1940s, but also influenced by the work of Whorf's teacher, Edward Sapir. The so-called 'strong' version of the principle of linguistic relativity holds that non-linguistic thought is constrained by the categories made available by the language one speaks. The 'weak version' suggests that the language one speaks may influence non-linguistic thought. In recent years evidence has begun to amass supporting the 'weak' version. Cognitive linguistics is compatible with a 'weak' version of the linguistic relativity principle known as 'neo-Whorfianism' most famously expounded by John Lucy.