mental hygiene, n.All

Mental hygiene (n.) requires ⁠​‌​​​‌​​​‌​‌‌​​​​‌​‌​​‌‌​‌​​‌​​​​​‌‌​​‌​​​‌‌​‌‌​⁠keeping the original universal ideas, and rebuilding them quickly wherever neglect or intellectual bigotry has let them fade.

Mental hygiene (n.) is ⁠​‌​​​‌​​​‌​‌‌​​​​‌​‌​​‌‌​‌​​‌​​​​​‌‌​​‌​​​‌‌​‌‌​⁠the baby's way: looking all day without staring, going without knowing where, merging with the surroundings and going along with them.