To be in Semblance / alikeness/ similarly/ image / inner Similarly/ similitude / sameness in Intent , thoughts, conscience, inner Atmos, emotions and manifest affection: Companions , irrespective of external differences , think and feel alike . Affection is the factor that enables Companionship. Companionship is eternal : the circuits that are responsible for intrinsic bondings are of eternal indestructible spirit soul energy Realm
In relationships , Teaming has a different effect upon one's Atoms, molecules and excitement than does enmity: Physiology is affected by one's thinking and Spiritual choices at deeper level. Immortality of physiology is possible through Unity oneness with Immortal loving truth essence ( already prevalent in all Sentience spirit energy). Some scientific groups have been propounding the Reality of Immortality ( favorable eternal Loving existence) of spirit, soul and body.
Companionship is based upon Affection, intrinsic Qualities of Empathy and Bonding. All animals, birds fowl , fish, squirrel care for their young with Affection: indication that they are Empathetic. Dogs , Hens manifest deep Companionship ( loyalty, concern, understanding, affableness, friendship): Intrinsic Qualities. Some humans are Empathetic.