To go on changing one’s butcher until one gets the meat one likes … is conduct not inappropriate to the relationship concerned; but to discard friends because they do not behave as we expected and refuse to be educated to our requirements is the conduct of a man who has altogether mistaken the character of friendship. Friends are not concerned with what might be made of one another, but only with the enjoyment of one another; and the condition of this enjoyment is the acceptance of what is and the absence of any desire to change or to improve.

from Michael Oakeshott.