This image is from a page in a Buddhist text. The qualities indicated by the words in this text (translated) as “non-dual, permanent, and inconceivable” are predated by centuries with the Sanskrit words "advaitha, alaya, and acintya.“
Such words in any language are attempts to word the wordless experience of being, which in English is sometimes understood to be "I.”
Budding students of spiritual insight who do not grok their own identity, nor the meaning within their own spiritual textbooks expressing this wordless miracle, however, sometime tend to insist “Buddhism” as a basic tenet holds ‘there is no self, no I.
But then that is not their fault, in that they do not call themselves Buddhaists.