Sonnet CXVI 

    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 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 Shakepeare   
                                    (1564 - 1616)