"In a difficult marriage, both of us have failed each other. Even though one may be the major problem,you also have failed often in the way you have responded to them, the way you have treated them, in the way you have handled your hurt and your pain."

Next Quote

One of the major problems encountered in time travel is not that of accidentally becoming your own father or mother. There is no problem involved in becoming your own father or mother that a broadminded and well-adjusted family can't cope with.

— Douglas Adams