Answer:
Inspiring
Step-by-step explanation:
Johannes Gutenberg is credited for Print Revolution in Europe. It is considered as the milestone in the modern world as it led to mass production of written text which were earlier difficult to circulate.
"Illuminating" refers to the inspiring period before the invention of printing. Books were written and copied by hand until 15th Century which required labor and hard work as compared to the ease of printing in the modern period. It was a painstaking task which definitely inspires us today with a lot of respect for our traditional methods.