'Look not back behind thee,' as in Genesis 19:17, means that Lot, who represents the good of charity, should not look to matters of doctrine. 'To look up,' is to look to celestial things. In Genesis 18:22, looking signifies thinking because seeing denotes understanding.

(Referencat: Arcana Coelestia 2245)

91. From the human face it can be seen what correspondence is. In a face that has not been taught to dissemble, all the affections of the mind present themselves to view in a natural form, as in their type. This is why the face is called the index of the mind; that is, it is man's spiritual world presented in his natural world. So, too, what pertains to the understanding is presented in speech, and what pertains to the will is presented in the movements of the body. So whatever effects are produced in the body, whether in the face, in speech, or in bodily movements, are called correspondences.