Play Is The Work Of Childhood.

The More We Try To Improve Our Schools, The Heavier The Teaching Task Becomes; And The Better Our Teaching Methods The More Difficult They Are To Apply.

The Child Who Defines A Lie As Being A "naughty Word" Knows Perfectly Well That Lying Consists In Not Speaking The Truth. He Is Not, Therefore, Mistaking One Thing For Another, He Is Simply Identifying Them One With Another By What Seems To Us A Quaint Extension Of The Word "lie".

In Genetic Epistemology, As In Developmental Psychology, Too, There Is Never An Absolute Beginning.

Equilibrium Is The Profoundest Tendency Of All Human Activity.

Every Acquisition Of Accommodation Becomes Material For Assimilation, But Assimilation Always Resists New Accommodations.