George Berkeley

"The essence of an object is never to be found in the object itself."

"That which exists independent of mind cannot be the object of thought."

"The human understanding is framed by habit and custom."

"Every unthinking being is necessarily, and from the very nature of its existence, perceived by some mind."

"The love of one's country is a noble passion when rightly directed."

"All apparent contradictions resolve when we understand that reality is mental."

"The greatest delight of the human mind is truth."

"Nothing unextended can be the immediate object of thought."

"The doctrine of abstract ideas is the source of almost all the confusion in philosophy."

"To suppose any being exists without being perceived is a rank absurdity."

"The mind acts as the substratum upon which all properties depend."

"No unthinking substance can be the subject of extension."

"The world as we know it is the expression of infinite mind."

"All knowledge flows from the perception of ideas."

"Those who most rail against vice are often most subject to it."

"The error of abstraction has infected almost every science."

"Nothing is more certain than that sensible objects exist only when perceived."

"The universe is a coherent system of ideas in the mind of God."

"All relations and abstractions are creatures of the mind."

"The greatest philosophical truths are often the simplest."

"Extension and motion cannot be conceived without thinking of them as existing in something."

"To deny the existence of matter is to affirm the existence of truth."

"The mind perceives nothing but its own ideas."

"All philosophical errors stem from improper abstraction."

"The unity of the universe depends upon the unity of its perceiving mind."

"Nothing more clearly demonstrates divine wisdom than the order of nature."