The text says, "Jefferson wrote specific ideals that he and his fellow colonists wholeheartedly believed to be true," Look at the quote from Thomas Jefferson on page 36, and find a word in the opening line that means the same as ideals or beliefs.
"We hold these truths to be self-evident, that all men are created equal, that they are endowed by their Creator with certain unalienable rights that among these are Life, Liberty and the persuit of Happiness."