He works through all of us to do what is wrong and destructive. Just because your spouse receives something demonic, is no reason for you to pick it up and carry it on. Like an argument for instance. It takes two to continue an argument. For everyone who exalts himself will be humbled, and he who humbles himself will be exalted.
Marriage is death to independent living .
No longer do either one of you have a life all your own. Whatever either one of you do, it affects the other. This goes along with no. 2 above. Selfishness is a sign of immaturity, of being unwilling to speak death to self. It is a sign of a hard heart.