If you really feel like getting sentimental, check out this Wait But Why, specifically the “Relationships” section. There’s also this awesome Kurzgesagt video which was inspired by it.
Wow.. I feel sad thinking about this now.. we really don't have enough time.. it also makes me angry how we spend most of our waking life working like donkeys and end up sacrificing the most important things we love..
Imagine that first strand of DNA trying to replicate in the young Earth against all the odds. Successfully changing and growing more complex, gradually improving over billions of years. All that toil and struggle will end with you unless you spaff into a fertile hole.