This is "So You're Going to Die", the Skeptical Nerd's Comic Guide to Coping
with Your Own Mortality.
Knowing that you will someday die can be rough! People have told us that this book has helped them find solace, and so we're exploring different publishing options to let people know that there are comforting philosophies and thoughts to be had.
You can scroll through the original Page by Page Version or you can get a closer look clicking through the Panel by Panel Edition.
(The comic's text was taken from my long-running site mortals.be - that site's page of quotes on mortality is still worth checking out.)