Human newborns demonstrate a readiness to mirror facial expressions and gestures, and both infants and adults frequently manifest their participant mirroring of what their companions are doing – to be illustrated and explained in this chapter. Sometimes they imitate or re-enact what they have seen being done. Sometimes they concurrently co-enact what the companion is doing as if they were virtual co-authors of the companion's doing, and sometimes they pre-enact slightly in advance what the companion is about to do or say as if coming to the companion's virtual aid, for example when spectators at a sports arena lift their legs as the high-jumper is about to jump, or when the spoon-feeder opens own mouth as the spoon is pushed into the opening mouth of the patient. Illustrations will be offered of infants who reciprocate feeding or even spoon-feeding before their first year's birthday, thus demonstrating their learning by imitative re-enactment by virtue of participant perception of their feeders' acts of feeding. The above and other illustrations of participant perception are specified in terms of the inborn capacity for other-centred participation, and indicated to be supported by a mirror neurons system adapted in hominin phylogeny to subserve learning to cope and take care by (m)other-centred participation. This facilitates the ontogenetic path to speech in the culture into which the infant is born and will be shown to open a window to altruism in young children, exemplified by some three-year old orphans. The ontogenetic path from primary to tertiary intersubjective enactment is specified to go by way of embodied simulation to verbal conversation with its reciprocal and participant characteristics by virtue of simulation of mind.