Don't be obstinate in your opinions
Eighthly, even should one be in the right, it is very important not to be obstinate in opinion. Supposing one correct in every particular, after simply expressing his opinion he should maintain unbroken silence if the dispute continues. It matters very little, after all, whether one is right or wrong (...)
We do not love people so much for the good they have done us, as for the good we do them.
Love does not consist of gazing at each other, but in looking outward together in the same direction.
It is not a lack of love, but a lack of friendship that makes unhappy marriages.