I don't mean the muscle-wrenching kind of pain but the very vaguely felt kind of pained drain when micro "blood" droplets drip out of the brain (as the synapses break down old connections and forcibly create new ones). Its an almost violent task that literally involves physical workout inside the brain, straining the cells, as you would strain your muscles in a physical workout.
Beyond just physically taxing, however, thinking is actually a morally demanding occupation requiring true courage.
I'm talking about independently thinking for yourself ---- understanding for yourself the facts, formulating your own opinions, and standing your ground amid a legion of loud mouthed fools who feel compelled that you should benefit from their "enlightened" opinion...
Instead of getting adept at the supposedly primal ability to think, people take the lazy way out via the socially acceptable practice of subscribing to other people’s opinions, (although they feel and they will insist it’s their own self-evident opinion). Some people will even go the extra mile of shaming you for having the gall to disagree with popular opinion and conventional wisdom.
How dare you, freakazoid! They will say. Don't be surprised, and don't be bothered. They have nothing of substance to say beyond that. Let them aghast at your manly audacity to use your own God-given brain. They will brand you with many put downs, even insults. Not your business to get emotionally affected, give them a wide grin.
If they bother you so much, then INSIST that they explain their point logically, in detail. They will be cornered to explain what they assume all this time to be self-explanatory gospel truths and self-evident laws of physics. Or, more often than not, they will just babel out the same intellectual shit they have been force fed with.
The diplomatic thing to do, sometimes, is to gently say, “but I don’t give a stinking bird’s cute little poop, my dear.” Give them space to let out a nervous laugh then excuse your self. If they still can't take a hint despite your generous politeness, just go back to plan number one --- ignore the bastard.
If you fear being alone, you will never know happiness. Ever.
The trouble with many adults today, is that they have learned to be perfectly contented inside the little crib they have been educated to accept. You bold opinions, plans, moves, ambitions and morality is a challenge for them to RETHINK their own entire lives. And since thinking requires courage... your success, happiness and very existence is a daring insult to who they are. Don't be surprised if they resort to verbal and non-verbal violence of any kind.
The reason why women instinctively find intelligent men sexy is because it takes courage to think, and women admire men with courage who can stand for their convictions. The reason why women abhor intelligent dweebs is because their supposed mental acuity is obviously a cover for their lack of functioning set of balls.