“Every mathematical discipline goes through three periods of development: the naive, the formal, and the critical.” ThreeDevelopmentDisciplinePeriodsCriticalMathematicalFormalNaive Author:David Hilbert
“After the initial critical learning period of youth is over, the areas of the brain that need to be 'turned on' to allow enhanced, long lasting learning can only be activated when something important, surprising, or novel occurs, or if we make the effort to pay close attention.” IfsNeedsLongImportantEffortPayAttentionBrainKnowledgeNovelYouthPeriodsAreasCriticalLastingSurprisingInitialsLong Lasting Author:Norman Doidge
“A lot is being done to bring additional protective measures, particularly the critical infrastructure locations around the United States, ... There is a very active ... program of coordination on this particular period of time with both public and private entities and at the federal, state and local levels.” StatesDoneLevelsUnitedUnited StatesParticularPeriodsProgramCriticalActiveLocalsEntityLocationInfrastructureProtectiveBeing DoneCoordination Author:Condoleezza Rice
“Every good historian is almost by definition a revisionist. He looks at the accepted view of a particular historic episode or period with a very critical eye.” LooksReasonEyeViewsHistoryParticularPeriodsVery GoodDefinitionsCriticalAcceptedHistorianEpisodesSkepticismHistoric Author:Paul Johnson
“Europe needs an engine, and the Franco-German motor has provided that when the two nations have converged on important topics during critical periods. But that partnership shouldn't be a directorate for other EU members.” NeedsTwoImportantNationsPeriodsMembersEuropeCriticalEnginesPartnershipTopicsMotorFrancoTwo Nations Author:Francois Hollande
“I love the lower ranges of my new voice. I really enjoy that. It's a challenge, and I accept the challenge. I sort of enjoy it now to reach notes that maybe four years ago I couldn't reach. I don't mean to grumble about it. I'm past that critical period and have gone on to a whole new field. And we go everywhere. We travel around the world, and I learn songs from every place we go, and it's a joyful process.” WorldYearsMeanWholePastSongProcessEnjoyVoiceChallengesAcceptingGoneFourFieldsPeriodsYears AgoNotesCriticalAround The WorldRangeFour YearsJoyful Author:Joan Baez