How do you deal with the supposed four ultimate existential concerns? Namely,
Death - How do you reconcile man's short lifespan with the desire for achievement, the finite with an innate hope for the infinite?
We all die. In the end, everyone I know, everything I've done, everything I've ever touched or influenced, will be burnt to ash and then broken down into its' component atoms and scattered through space. No statues of me will last, no monuments made in my likeness shall endure, no histories telling of my tales shall persist.
In the end, I shall truly and fully die, and everyone who ever knew me shall go with me.
This leaves us with pretty much 2 main options: live in denial of this and try to attain immortality, either literally or through proxy (children, family name, recognition, history, religion, etc), or just accept this fact and enjoy the life yeu have while yeu have it.
Most people live in fear and denial. I'd rather just go with the latter choice myself. Once yeu do that, there is no concern any longer as it's an absolute and pointless to fight against.
"God grant me the Serenity to accept the things I Cannot change… Courage to change the things I can, and Wisdom to know the difference…"
I know that I can't change death, and have, after many years thinking on the matter, the wisdom to not bother trying to.
Meaninglessness - Assuming there seems to be a lack of inherent objective meaning in the universe, and that is truly a cold and unforgiving place, how do you find the motivation to excel and maintain a sense of compassion?
See the matter on death; once again, eventually my purpose here will be GONE. I will have no lasting impact on anything. Any meaning I have is transitory, fleeting, and locked in this moment.
Therefore, I do not bother dwelling on long term "change the world". Why bother? I can affect the lives of those directly near me for the better, and if it doesn't burden me to do so, sure why not? No reason not to really. But I'm not going to sacrifice myself for some "greater purpose".
The meaning in life is the meaning yeu put there; yeu aren't given purpose by default, yeu have to make it yeurself. Once yeu're gone, it may linger like a ghost for a time, but eventually, that too shall fade.
Live for the moment, but not at the expense of yeur future. Once yeur future is foreseeably removed, then yeu may as well just live for the moment after that point. The whole "Whot would yeu do if yeu had 24 hours to live" thing =3
Freedom - If choices are unlimited, how do you avoid become hopelessly lost?
Variations on a theme are still dumped into that underlying theme. Yeu may have an infinite ways to spread hazlenut spread onto yeur toast, yeu could do it horizontally, vertically, in small amounts, treat it like a painting, or whotever, but it's still putting chocolate on toast so really, the 'infinite' choices is a moot point.
Stop panicing about the needless details; isolate the key main choices yeu have, and once yeu've done that, yeu'll realize yeu really didn't have any choice in the first place, just the illusion thereof.
Yeur decisions are premade, dependent upon context, situation, history, memory, etc. Yeu've already MADE yeur choice before it was even presented to yeu. The only thing left is to understand the choice yeu made.
I already 'know' I'm going to eat that extra slice of cake; I may be debating it back and forth in my head on the pros and cons, but it doesn't matter, I'm going to do it anyway from the start, it's just a matter of which combination of excuses and rationalizations I'm going to use to excuse myself for doing it.
The inverse is also true; if yeu're NOT going to have that slice of cake, will yeu use the "I can't afford to gain weight" or the "it costs too much money" excuse? Yeu've already made up yeur mind, yeu just haven't rationalized the decision yet.
In the end, yeur choices are false; they do not exist. The only thing yeu choose is how to interpret the choice yeu already didn't make.
Existential Isolation - If ultimately, no one can truly know you or understand you, how do you overcome this essential feeling of loneliness?
BY FEELING SPECIAL I'M UNIQUE! JUST LIKE EVERYONE ELSE! =D
Seriously, I don't even understand myself, why should anyone else? I don't feel lonely at all, because I realize that I don't understand myself. As such, I'm always together with everyone else who doesn't know me either.
The mistake people make, is thinking they actually know who they are, and fully understand their own motivations down to the deepest subconscious levels. Yeu are lonely because yeu are manually separating yeurself from everyone else; if yeu didn't actively try to make yeurself separate from the rest of the world, yeu wouldn't be lonely now would yeu?
Funny how that works.
Yeu can be unique and yeurself, without understanding who yeu are. It doesn't mean yeu shouldn't try, but rather, yeu should accept this lack of self understanding and use it to bind yeu closer to others.
Some of... actually no, MOST of my most meaningful conversations... have actually been very close ones with people I care about, exploring whot we don't know about our own selves. The fact that they may know things about me that I don't even know about myself is where that loneliness is defeated, as is the moment when I get to share that I know something about them that they didn't know themselves.
Being pissed noone understands yeu is pointless; why the hell aren't yeu trying to get them to learn to understand yeu? Or at least trying to understand yeurself? Trust me, yeu really don't know yeurself nearly as well as yeu'd like to think. Yeu may know yeu'd do something, but chances are yeu probably don't really know WHY.
When yeu realize that yeu are still as much an enigma to yeurself as to anyone else, then yeu'll have defeated this fourth 'concern' fully.