When Adam became the theater of Divine inspiration and love,
his rational soul revealed to him the knowledge of the Names.
His tongue, reading from the page of his heart,
recited the name of everything that is.
Through his inward vision his tongue divulged the qualities of each;
This is the basis of what is called 'abjid' (arabic) or 'gematria' in Greek in which names are given a numerical value. The Hebrew Kaballah has this science also Aleph (1), Beth (2), Gimel (3) and so on.
In the Zohar it is written
"Had the brightness of the glory of the Holy One, blessed be his name, not been shed over the whole of his creation how could he have been perceived even by the wise? He would have remained (totally) unapprehensible, and the words "The whole earth is full of his glory" (Isaiah 6:3)could never be spoken with truth. But the closer man comes to his pure and divine essence, the more he experiences the intrinsic unity in all the emanations of the Sefiroth; for this unity is none other than the essence of man, the supreme 'self'" ((from 'The Universal Meaning of the Kabballah by Leo Schaya pg.28))