/* Load values of system variables */
public $humanity, $kindness, $gentleness;
public $inhumanity, $hate, $greed;

$alive = true;
$man = $humanity + $kindness + $gentleness;
$machine = $inhumanity + $hate + $greed;

while($alive) {
theBalance($man,$machine);
} else {
end;
}

Also, integer values should not be defined or compared as strings.

“sin++” probably needs to be “$sin++”, because otherwise “sin” would be either a constant (and you can’t modify constants), interpreted as the string “sin”, or the trigonometric function sin().

while($alive == true) could be simplified as while($alive) (as can all the , and to avoid one extra $deathAge–; you could add break; after $alive=false;.

Also, it’s not really good practice to have user-definable variables so deep inside the code ($acceptChrist).

Oh, and the global variables aren’t, due to PHP’s retar… unconventional scoping, visible within the functions, unless you define them with global $…; within the function body.

… And the if clause lacks parentheses in eatForbiddenFruit.