If happy I and wretched he, Perhaps the king would change with me. — Charles Mackay

Man needs, for his happiness, not only the enjoyment of this or that, but hope and enterprise and change. — Bertrand Russell
We are not the same persons this year as last; nor are those we love. It is a happy chance if we, changing, continue to love a changed person. — W. Somerset Maugham
They must often change, who would be constant in happiness or wisdom. — Confucius
He who has mingled in the fray of duty that the brave endure, must have made foes. If you have none, small is the work that you have done. — Charles Mackay
An arrow may fly through the air and leave no trace; but an ill thought leaves a trail like a serpent. — Charles Mackay
Men, it has been well said, think in herds; it will be seen that they go mad in herds, while they only recover their senses slowly, and one by one. — Charles Mackay