* Fear: Mary Warren is afraid of Abigail Williams and the other girls who have accused others of witchcraft. She knows that if she speaks out against them, she could be in danger.
* Self-interest: Mary Warren wants to be liked and accepted by the other girls. She knows that if she tells the truth about what she saw in the forest, she will be ostracized.
* Guilt: Mary Warren feels guilty about her involvement in the witchcraft trials. She knows that she has done wrong, and she is afraid of the consequences.
* Confusion: Mary Warren is a young and impressionable girl. She is easily swayed by the opinions of others, and she is not always sure what is real and what is not.
Mary Warren's failure to tell the truth has devastating consequences. It leads to the deaths of innocent people, including John Proctor, and it destroys the lives of many others.