You can learn loads from cats. Humility, patience, handling disappointment with grace, being the bigger cat, compassion, love, curiosity as well as sloth, greed, selfishness and just being a bit of a knobhead.
After getting two of my cats that were resting in separate spaces, into the same box, it was a nice surprise waking up to find they had been sharing the knowledge of this new co-existence with the third cat, who wisely had signed himself up. There was about 2 inches of space left, but that made the box even more cosy and each cat could be the next cat's pillow.
When they were sleeping in different rooms, two of them became shabbier because they find cleaning themselves a bit boring. The other one loves to clean things in general and so now that they've been spending more time together their coats have started to shine.