A lot of facts about our lives (like the lack of control over it and the inevitable death afterwards) are tough to swallow, so it's best you learn about them from somebody soft and fluffy. Luckily, there's a tumblr, dedicated to using cats to deliver heavy information. It's called Hard Truths From Soft Cats, and it helps to carry the burden of existence.
Some of these messages are objectively true and some are subjectively false but the collection of these images can be described as a healthy introduction to pessimism. American philosopher and psychologist William James came up with the equation: happiness = expectations / reality. According to it, there are two ways to live a happier life - change reality, or change expectations. Pessimists reduce the expectations. They prepare themselves for the worst by reducing tension and shielding from disappointment. However, don't think of them as grim - they can easily fill the gap between what should be and what is with laughter. Just like these comics do!
More info: tumblr