“The world is mere change, and this life, opinion.”

“Life is opinion.”

“A man should always have these two rules in readiness. First, to do only what the reason of your ruling and legislating faculties suggest for the service of man. Second, to change your opinion whenever anyone at hand sets you right and unsettles you in an opinion, but this change of opinion should come only because you are persuaded that something is just or to the public advantage, not because it appears pleasant or increases your reputation.”

“The universe is change; our life is what our thoughts make it.”

“The whole universe is change and life itself is but what you deem it.”

“I have often wondered how it is that every man loves himself more than all the rest of men, but yet sets less value on his own opinion of himself than on the opinion of others.”

“Everything we hear is an opinion, not a fact. Everything we see is a perspective, not the truth.”