par domu spēku..
'... thoughts - just mere thoughts - are as powerful as electric batteries - as good for one as sunlight is, or as bad for one as poison. To let a sad thought or a bad one get into your mind is as dangerous as letting a scarlet fever germ get into your body. If you let it stay there after it has got in you may never get over it as long as you live.'

/from 'The Secret Garden' by Frances Hodgson Burnett/