JQuery :: Contains('text') Return Is Always True?

I have a question concerning :contains(). I use it in the following manner:

if($("div:contains('Built From')", $(itemProps)))
{
//Do stuff.
}

itemProps is DOM Element. It has a a div inside it which class is always something else however that div has either "Built From" or "Builds Into" as a text. Inside itemProps there is no other div with those words. I want to know which of those texts the div within itemProps contains. However this bit of code seems to always return true. Some goes for when I use the text "Builds Into". Even when the text is not in the div.