I don't think Augustine could have ever predicted the influence his book would have. Not only did he increase faith in Jesus Christ, he created a whole new literary genre and his personal applications of faith changed life-styles for many Christians of his day.
I feel like the reverse is often true of media today, where people create, post, tweet, like, etc. about their lives with the hope of being spotted or seen and attaining fame and remembrance rather than doing something of depth and substance with the intent of improving another's life. I know this isn't always the case, however, I do think it's a phenomenon particular to our day and age (correct me if I'm wrong). The newest medias do seem to promote this kind of usage, but the media that promotes the good in the world with the intent of increasing goodness is the most influential in my life and hopefully the media that sticks the best for us all.
Like this video about God's existence:
I was introduced to this video about a year ago, and every time I watch it I get goosebumps, so good!!
The Church of Jesus Christ of Latter-day Saints has an uplifting campaign, #sharegoodness, that promotes sharing the good in the world. Who knows the influence this single campaign may have over the course of history, whether it is world history, literary history, media history, or a single personal history. Either way, I am grateful for the opportunity it presents me to share my personal application of faith in Jesus Christ. #sharegoodness