William Shakespeare

Let me not to the marriage of true minds
Admit impediments. Love is not love
Which alters when it alternations finds,
Or bends with the remover to remove:
O no; it is an ever-fixed mark,
That looks at 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 hour and weeks,
But bears it out even to the edge of doom.
    If this be error, and upon me prov’d, 
    I never writ, nor no man ever lov’d.