When the wife is a Catholic, the fact that she is a good woman and true wife satisfies the Protestant husband, as a rule, and he makes no objection to her carrying out the contract with her Church regarding the education of the children.
If they are as moral and good as their mother, he does not care what faith occupies their hearts or in what way they worship God.
But to the mother this is a matter of vital importance.
Woman is by nature more devout than man.
Woman is by nature more tyrannical than man.
Take those two characteristics, and add to them the tendency of many women to bigotry and intolerance, and it makes the matter of creeds vital in marriage.
Rosalie is broader-minded than many women, yet she is devoted to the Congregational Church, and rarely misses attendance.
It will be an easy matter for her to accept your faith for yourself and to allow you to attend your own church, and she is, I am sure, broad enough to go with you occasionally, if you request it.
But when she becomes a mother, and the children's minds are unfolding, I doubt her willingness to have them brought up in any faith save her own.
To an unwedded girl in love, a child is a very indistinct creature.