Pura vida is Spanish for Pure Life. In Greek that would be Αγνή ζωή.
The life is too short to learn to live - Η ζωή είναι πολύ σύντομη για να μάθει κανείς να τη ζει.
Or you can try my favourite:
Ancient Greek: Ὁ μὲν βίος βραχύς, ἡ δὲ τέχνη μακρά.
Ancient Greek transliterated: Ho men bios brachys hē de technē makrā.
Latin: Ars longa vita brevis
English: Art is long but life is short.