Affection requires a firmer foundation than sympathy, and few people have a principle of action sufficiently stable to produce rectitude of feeling; for in spite of all the arguments I have heard to justify deviations from duty, I am persuaded that even the most spontaneous sensations are more under the direction of principle than weak people are willing to allow.
Letter 17 - Letters Written in Sweden (1796)
Letters Written during a Short Residence in Sweden, Norway, and Denmark