JavaScript: Convert array of strings to array of variables and pass it as arguments to a function

I have an array, for example:

argumentsArray = ["arg1", "arg2"];

And I have a function:

function1 = function () {
    console.log(arg1);
    console.log(arg2);
};

Now of course executing function1 will throw an error because arg1 and arg2 aren't defined. But I don't want to define these, I want them used as arguments, like so:

function1 = function (arg1, arg2) {
    console.log(arg1);
    console.log(arg2);
};

Now we could execute function1 when we pass two arguments to it:

function1("string1", "string2");
// will log "string1" and "string2"

But the problem is, I can't change the source code of function1. I can't edit it's arguments. I'm aware of the bind() and apply() function, but they would do the wrong thing, because the actually apply the strings:

getFunction1WithArgumentsFromArray = function () {
    return function () {
        return function1.apply(this, argumentsArray);
    };
};

getFunction1WithArgumentsFromArray();
// would return function1("arg1", "arg2");

The thing is, arg1 and arg2 are not defined yet. They aren't strings or any other thing yet. My code looks something like this:

function1 = function () {
    console.log(arg1);
    console.log(arg2);
};

argumentsArray = ["arg1", "arg2"];

defineArgs = function() {
    arg1 = "hey";
    arg2 = "hello";
};

getFunction1WithArgumentsFromArray = function (argumentsArray) {
    argumentsToUse = convertArrayOfStringsToArrayOfVariables(argumentsArray);
    // HOW???

    return function () {
        return function1(argumentsToUse[0], argumentsToUse[1]);
    };
    // or what should i put here???
};

getFunction1WithArgumentsFromArray();
// should return this:
// function1 = function(arg1, arg2) {
//     console.log(arg1);
//     console.log(arg2);
// };
// without executing it.

So what I'm really looking for is a function that turns an array of strings into an array of variables with the names of these strings:

["arg1", "arg2"] --> [arg1, arg2]

But making this directly would be a problem, because JavaScript then searches for these variables. As I said, these variables aren't defined...

One I idea I had is to use apply() and pass an Array with eval("string")s like so:

getFunction1WithArgumentsFromArray = function () {
        return function () {
            return function1.apply(
                this,
                [eval(argumentsArray[0]), eval(argumentsArray[1])]
            );
        };
    };

getFunction1WithArgumentsFromArray();
// would return "arg1 is not defined", because eval() executes the function as I define it

This may seem very very unnecessary to you, but as I already said, I can't change the function1 so I have to create it's arguments list in another function. I mean, of course I can change it, but the project I'm working on, uses an array to get arguments.