What is the ruling on sending the saying: "If you want your wife to be like Khadijah, then be like Muhammad (peace be upon him)," in emails and on mobile phones, to encourage young people to be righteous and emulate the Prophet (peace be upon him)?

The apparent meaning of the statement indicates there is no harm in it, especially if the intention is to encourage the adoption of noble character traits among people in general, and between spouses in particular, and that the role model in this regard is the noble Prophetic household.