As if you want to know same as Buddha explained to Rahula it is, nothing is eternal. Everything has to cease and that he trying to get from Rahula if he understand suffering at all. And what we desire with sensation of eye, ear, nose, tongue, body, and mind that we have to overcome sensuality with these sixth strings of sensuality and further things he explained are Form, Consciousness, Contact, Feeling, Perception, Volition, Craving, Elements, and Aggregates. Buddha explaining Rahula that all Forms, Consciousness, Contact, Feeling, Perception, Volition, Craving, Elements we get sense with sixth strings of sensuality and those aren't permanent. He explained with Element that after we die body and soul merge in the earth Elements and that elements also aren't eternal. And eventually aggregates that everything Form, Consciousness, Contact, Feeling, Perception, Volition, Craving, Elements (That we could get sense with sixth strings of sensuality are eye, ear, nose, tongue, body and mind) are Impermanent.
Forms : sounds, odors, tastes, tactile objects, mental phenomena forms we get through sixth sense.
Consciousness: eye-consciousness, ear-consciousness, nose-consciousness , tongue-consciousness, body-consciousness and mind-consciousness.
Contact: eye-contact, ear-contact, nose-contact, tongue-contact, body-contact and
Feeling: feeling born of eye-contact, feeling born of ear-contact, feeling born of nose-contact, feeling born of tongue-contact, feeling born of body-contact and feeling born of mind-contact.
Perception: perception of sound, perception of odors, perception of tastes, perception of tactile objects, perception of mental phenomena.
Volition: volition regarding form, volition regarding sound, volition regarding odors, volition regarding tastes, volition regarding tactile objects, volition regarding mental phenomena.
Craving: craving for form, craving for sound, craving for odors, craving for tastes, craving for tactile objects, craving for mental phenomena.
Elements: The water element, The heat element, The air element, The space element, The conscious element
Aggregates: form, feeling, perception, volitional formation, consciousness
So see the beginning and the end. I'd say telescopic like if we have to sensuality with sixth strings of sensation we experience(impermanent) everything as Buddha explained so Rahula experiences revulsion towards forms,
revulsion towards consciousness.
Experiencing revulsion, he becomes dispassionate. He understands.
So we have to free from this all and have to achieve peace and Nirvana.
This is Dhamma