Christiaan Huygens

“Each element of a wave-front may be regarded as the center of a new disturbance.”

“The world is my country, science is my religion.”

“I believe that we do not know anything for certain, but everything probably.”

“A Man that is of Copernicus’s Opinion, that this Earth of ours is a Planet, cannot but sometimes have a fancy that the rest of the Planets have their Dress and Furniture, nay and their Inhabitants too as well as this Earth of ours.”

“There is a certain laudable Partiality, which every Man has, or ought to have, for the Country and People to which he owes his Birth and Education.”

“Patience is a necessary ingredient of genius.”

“My practice is to render my discoveries without envy or jealousy.”

“We may pronounce that they are all stock'd with Plants, and Trees, and Animals, as well as we.”