The cook plays an important part in the nourish ability of food.
Meals which are lovingly prepared with a profound desire for the welfare of the eater
always benefit the body and mind more than do meals which are commercially prepared,
or which have been prepared by someone who is indifferent to or dislikes the proposed eater.
No one should cook when in a state of indifference, agitation, sorrow or anger.

From The Hidden Secret of Ayurveda, by Dr. Robert E. Svoboda