When a man takes a wife the authority of the father and mother over their married son is broken,
for that man has become the head of his own home. Also, the wife is no the main focus for the husband. Even though the fifth commandment says “to honor your father and mother” this
command takes second place to honoring the wife and the new home. The two concepts are
not incompatible, but the wife and the marriage take precedent over the married son’s childhood home. The man does not bring a wife into his father’s home (to live in the basement), but neither
does this verse say a man leaves his father’s family and joins the family of his wife. The point
is that upon marriage the married couple are on their own and under their own authority.
A new family has begun and a new home has been established.

The word “united” used in “united to his wife, and they become one flesh” is the Hebrew word
dabaq. It places emphasize on the bond and covenant of this new relationship. To “become
one flesh” is not a reference to the sexual union, but is a statement that a new unit, or a
new identity, has been created. The married man and his wife maintain their status as individuals,
but upon marriage they create a new identity that binds them together socially in the kingdoms
of man, spiritually in the view of the heavenly realms, emotionally in their souls and, indeed, physically.  Marriage creates a new union that had never existed before and it is to be
recognized and honored by all mankind.

"I do not believe one can settle how much we ought to give.
I am afraid the only safe rule
is to give more than we can spare. In other words, if our expenditure on comforts, luxuries, amusements, etc.,
is up to the standard common among those with the same income as our own, we are probably giving away too little. If our charities do not at all pinch or hamper us, I should say they are too small. There ought to be things we should like to do and cannot do because our charitable expenditures exclude them."
- C.S. Lewis