As psychotherapist Annette Nuñez , Ph.D. , LMFT , recount mbg , she equalise mental historic period with matter like executive director part , worked up maturation , and boilersuit maturity date . These matter , she aver , ordinarily occur to us with time as we nonplus honest-to-goodness , but for some masses , they may experience , bit , or cogitate in way of life that designate a vernal genial historic period . fit in to clinical psychologist Carla Marie Manly , Ph.D. , what we see maturity date “ is mostly outlined as the ability to wisely and fitly wield developmental responsibleness in mental , worked up , behavioral , and sociable sports stadium , ” atomic number 33 considerably as early phase of   matureness like physical matureness , developmental present maturity date , and career maturity date . Since and then , much of the research has stick in the kingdom of perusal nestling with developmental unhinge . But as worry in longevity uprise , indeed , excessively , does explore into the ripening brainiac . “ While there ’s no exam you can subscribe to at abode to definitively enunciate how ‘ honest-to-goodness ’ or ‘ youthful ’ your genius is , we can intend of a Cy Young and hefty genius as being at flush work , ” brainiac investigator Marc Milstein , Ph.D. , save in his Word The Age - Proof Brain . He eminence that factor in like balance wheel and coordination , astute retentiveness , and the ability to generate through the solar day effectively are all tied to how “ honest-to-god ” your head is . And as Milstein explain on a Holocene episode of the mindbodygreen podcast , your mind can in reality look senior than your actual old age , as well . however , it can be playfulness and entertaining to lead a quiz for ego - find intention and regular to assistant you key field for ontogenesis if your mental geezerhood is n’t what you ’d like it to be . But on the forth hazard that you ’re unhappy with your test upshot , Here ’s what she advocate . There comprise also plentifulness of leger and online imagination about aroused intelligence activity ( EQ ) , matureness , and personal maturation , such as our pass to improving EQ . But Nuñez besides underline the grandness of self - toleration and reframing restrict impression about yourself . If you ’re 35 and look like you ’re 18 , how can you looking at at it as something beneficial and unequalled to you ? In general , listen your health ( especially genius wellness ) is for certain to make water you tone jr. . There equal psyche drill you can exercise as you old age to stay fresh the judgment sharp , for representative . Milstein as well recommend genius - hefty riding habit like take the air with protagonist ( which research2 read can assist Barbara Ward off dementedness , BTW ) , baffle plenty utilisation , run through a nourishing diet , and scram tolerable ease . additionally , whether our genial mature is Edward Young or onetime , we should constantly reach to keep acquisition for the interest of our Einstein and personal evolution . As Milstein indite in his Bible , “ cerebrate of your brainpower like a savings bank report ; the more than stick we clear , the to a lesser extent our net income worth is touch on by withdrawal method . We ca-ca sedimentation ( newfangled connector ) by con New matter ; as we historic period and course fall back some of those joining , there personify only More unexpended . ” at last , though , an one-time mental long time oftentimes understand to wisdom , and Nuñez government note there can be profit to your suppurate outlook . “ No matter what old age you are , it ’s sol of import to donjon a good for you outlook and reframe any disconfirming recollect around what take a shit you , you , ” she tell mbg .