A cheerful frame of mind, reinforced by relaxation... is the medicine that puts all ghosts of fear on the run.
“The problem of distinguishing prime numbers from composite numbers and of resolving the latter into their prime factors is known to be one of the most important and useful in arithmetic.”
“This system of encouragement proves serviceable as a preventive of punishment, the attainment of the tickets being a reward, the forfeiture of them the reverse; and, as such, boys seem often more affected by their loss than by coercion.”