The goal of the Torah is to bring us to fully control our human personality and to use it for the good and for the spiritual. The Torah commands us to channel, elevate, moderate and direct the forces and powers in the human personality. Holiness means rising above the nature of this world. Let's go a step further. We must emulate His spiritual essence and characteristics, not only in what we do, but in how we do it.
Holiness elevates both action and state of being.
G-d's holiness itself provides the imperative for the Jew to be holy in all things. The conduct of the marriage, the treatment of the partners, and the atmosphere in the Jewish home are to be holy. Each Jewish spouse should be able to discern that G-d is behind the way spouses basically treat each other and the way the marriage and home basically operate. The marriage can allow an occasional forgivable human foible or booboo arising out of the imperfections of its human inhabitants. This gives an insight into the holiness particular to marriage.