When you listen very carefully to advice given by your parents and you actually pay attention and consider what they are saying, this is an example of a time when you hearken.
Origin of hearkenMiddle English herknien ; from Old English heorknian, hyrcnian ; from base of hieran: see hear
intransitive verbhear·kened, hear·ken·ing, hear·kens also har·kened or har·ken·ing or har·kens
Origin of hearkenMiddle English herknen, from Old English hercnian; see kous- in Indo-European roots. Usage Note: Traditionally, hearken means “to listen.” The word has an archaic and formal air today, in part stemming from its extensively use in the King James Bible (as in Mark 7:14 “Hearken unto me, every one of you”) and in traditional storytelling. In contemporary usage, hearken is more often used where one might expect hark, no doubt because of sound similarity: The movie hearkens back to the sci-fi films of the 1950s. The Usage Panel has mixed feelings about this. In our 2009 survey, just 48 percent accepted this example.
(third-person singular simple present hearkens, present participle hearkening, simple past and past participle hearkened)
From Middle English hercnen, from Old English *heorcnian, suffixed form of an assumed *heorcian (cf. hark), from the same root as hȳran (whence hear), with a formative/intensive -k. Equivalent to hark + -en.