No one can see her with material eyes, for no materialist has such power. To say nothing of touching mother Sita, a person with material senses cannot even see her. When Ravana kidnapped her, he kidnapped only her material, illusory form. As soon as Ravana arrived before Sita, she disappeared. Then just to cheat Ravana she sent an illusory, material form.
Spiritual substance is never within the jurisdiction of the material conception.
This is always the verdict of the Vedas and Puranas. Although the brahmana was fasting, he had faith in the words of Sri Chaitanya Mahaprabhu and accepted food. In this way his life was saved. After thus assuring the brahmana, Sri Chaitanya Mahaprabhu proceeded further into southern India and finally arrived at Durvasana, where He bathed in the river Kriamala. He saw Lord Parasurama.