When you meet someone new who instantly gets you your sense of humor and your attitudes and your worldview even if theirs are different - and you get them in return. You both talk and talk and agree and laugh and nod and yes yes of course you should get another round of drinks.
Now it is established in the sciences that no knowledge is acquired save through the study of its causes and beginnings if it has had causes and beginnings nor completed except by knowledge of its accidents and accompanying essentials.
