all those people who say 'family is first' you are wrong- your life is first. you are first. before any arbitrary connection through genetics and where you spent your first years, family should not be first you should know that the family you choose comes first, but even before that comes the right to choose your own family.
'blood is thicker than water' used to mean 'the blood of the covenant is thicker than the water of the womb'. meaning that bonds formed by oath and friendship are stronger than biological bonds alone.