You must know that it is at home that you are what you really are.
I question whether any man is much better than he is
thought to be by his wife and family, for they, after all,
see the most of us, and know the truth about us.
Sir, you may be seen by those outside your family to be
"amiable, Christian, and God-like".
But if your children should have to mark your unkindness,
your lack of fatherly affection for their souls; and your wife
has to complain of your harshness, of the absence of everything
that is Christ-like, you may shrewdly suspect that there is
something wrong in the state of your heart.
- Spurgeon's sermon, "Holiness Demanded"