“I believe that we do not know anything for certain, but everything probably.”— Christiaan Huygens Related Quotes “Roark spoke quietly. He was the only man in the room who felt certain of his own words.”— Ayn Rand “Courage is a certainty.”— Lailah Gifty Akita “From whomsoever one hears anything, it is wisdom to understand the true import of it.”— Thiruvalluvar