“...imitation supplements inadequate congenital variations in the direction of an instinct, and so, by keeping the creature alive, sets the trend of further variations in the same direction until the instinct is fully organized and congenital. If both of these… — Karl Groos Copy Share Image
“...play [is] an instinct developed by natural selection ... and ... on a level with the other instincts which are developed for their utility.… — Karl Groos Copy Share Image
“...play, so far from being "by play," if I may so speak, is a matter of serious moment to the creature. Play is a… — Karl Groos Copy Share Image
“...imitation supplements inadequate congenital variations in the direction of an instinct, and so, by keeping the creature alive, sets the trend of further variations… — Karl Groos Copy Share Image
“Imitation is a real instinct, but it is not always playful; play is a real instinct, but it is not always imitative. There is… — Karl Groos Copy Share Image
“But as we ascend to animals of high types, having faculties more efficient and more numerous, we begin to find that time and strength… — Karl Groos Copy Share Image
![“...play [is] an instinct developed by natural selection ... and ... on a level with the other instincts which are developed for their utility. It is very near, in its origin and function, to the instinct of imitation, but yet they are distinct … Its utility is, in the main, twofold: First, it…” quote by Karl Groos](https://sms4smile.com/quotes/img-quotes/2c5/karl-groos-64240_instinct_play-is-an-instinct-developed-by-natural_203566.jpg)
