Centuries ago, when reading and writing were not that common, the monks in the monasteries were busy reading and writing, and the writing they were doing was not on a typewriter, nor heaven forbid, on a computer or on any kind of keyboard such as we know today. I've got to say that the writing they turned out back in those days was calligraphy and calligraphy only. How many of you have seen a copy even of our [more recent] Declaration of Independence in this country, or of the Magna Carta in ancient Europe or such documents. These things were all turned out by a scribe or scribes: persons whose professions and livelihood were those of copying things down.
It may have not been as easy to read, or to decipher, as the typeset that shows up today, but it was much more beautiful. Beautiful and flowery and impressive.
Today such qualities are some of the main reasons why calligraphy is used in the various ways and places it is used: to decorate, to impact, to glorify, to draw the attention, to beautify!