How to manipulate a tabbed view in Titanium and add SQLite content?

The Overview

I am fairly new to Titanium and I decided to finally start working with SQLite and some new UI features. I opted for the TabGroup as I felt that would be the best option. However I'm having a few issues. I am trying to simply get some quotes which have been inserted to a table (tested and working, I alerted them out and it worked) and I wish to display them out in the wiseWords tab, so the user can view them.

The Code

index.xml

<Alloy id="index">
    <TabGroup>
        <Require src="home"></Require>
        <Require src="wiseWords"></Require>
        <Require src="settings"></Require>
    </TabGroup>
</Alloy>

index.js

$.index.open(); 

/** Create and populate the wise words table. **/
Alloy.Globals.createRequiredTables();

var selectWiseWordsSQL = "SELECT * FROM wise_words";
var selectWiseWords = Titanium.App.db.execute(selectWiseWordsSQL);

while (selectWiseWords.isValidRow()) {
    /** Create labels for each quote. **/
    var addQuote = Titanium.UI.createLabel({
        text : selectWiseWords.fieldByName("saying") + " - " + selectWiseWords.fieldByName("quoted_by"),
    });

    /** Add quote to window (available in wiseWords.xml). **/
    $.wiseWordsWindow.add(addQuote);

    selectWiseWords.next();
}
selectWiseWords.close();

wiseWords.xml

<Alloy>
    <Tab id="wiseWordsTab" title="Wise Words">
        <Window id="wiseWordsWindow" class="container" title="Wise Words">  
        </Window>
    </Tab>
</Alloy>

The Error(s)

Runetime Error

Location: alloy/controllers/index.js

Uncaught TypeError: Cannot call method 'add' of undefined.

Source: $.wiseWordsWindow.add(addQuote);

To Clarify...

I understand what the error means, but don't understand why it is being thrown.

1. Why can't I access the view for wiseWords.xml in index.js even though wiseWords is referenced in index.xml through the <Require> tag?