“The most insidious thing about bondage was how easy it was to grow accustomed to it.”
“Happiness is the most insidious prison of all.”
“People quickly grow accustomed to being the slaves of mystery.”
“Of all the varieties of modern pollution, noise is the most insidious.”
“and new conditions of existence will spring up, to which other men will grow just as accustomed, and I shall not know about them, for I shall be no more!”
“And action is the only remedy to indifference, the most insidious danger of all.”