“The greatest discovery of my generation is that a human being can alter his life by altering his attitudes of mind.”

“The greatest discovery of any generation is that a human can alter his life by altering his attitude.”

“The greatest discovery of any generation is that human beings can alter their lives by altering the attitudes of their minds.”

“The greatest revolution of our generation is the discovery that human beings by changing the inner attitudes of their minds, can change the outer aspects of their lives”

“The man who never alters his opinion is like standing water, and breeds reptiles of the mind.”

“Human beings, by changing the inner attitudes of their minds, can change the outer aspects of their lives.”

“Let me not to the marriage of true minds Admit impediments. Love is not love Which alters when it alteration finds, Or bends with the remover to remove. O no, it is an ever-fixed mark That looks on tempests and is never shaken; It is the star to every wand'ring barque, Whose worth's unknown, although his height be taken. Love's not Time's fool, though rosy lips and cheeks Within his bending sickle's compass come; Love alters not with his brief hours and weeks, But bears it out even to the edge of doom. If this be error and upon me proved, I never writ, nor no man ever loved.”