Love is not love
Which alters when it alteration finds,
Or bends with the remover to remove;
No! it is an ever-fixed mark,
That looks on tempests and is never shaken;
It is the star to every wandering bark,
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. [ William Shakespeare ]

Nature is not fixed, but fluid; spirit alters, moulds, makes it. [ Ralph Waldo Emerson ]

Every thought which genius and piety throw into the world, alters the world. [ Emerson ]

Though a man declares himself an atheist, it in no way alters his obligations. [ Henry Ward Beecher ]