come home, bring home

1. Come home (to somebody): 

(Cambridge Am-Idioms) to become completely clear to someone 

• The reality of his loss finally came home to him. 
• Usage notes: usually said about something that is difficult or unpleasant

(McGrow-Hill) Fig. [for a fact] to be recognized suddenly by someone. 

• Suddenly, it came home to me that you thought I was Ronald. 
• The importance of the events of the day finally came home to me.
  

cf: come home (to roost) 

1. Lit. [for a fowl or other bird] to return to its home, as for a night's rest.
   .. The chickens come home to roost in the evening.
   
2. Fig. [for a problem] to return to cause trouble [for someone].
   .. As I feared, all my problems came home to roost.
   

... http://idioms.thefreedictionary.com/come+home

2. Bring home: 

13. PHRASE : V inflects, usu PHR to n

To bring something home to someone means to make them understand how important or serious it is.

• Their sobering conversation brought home to everyone present the serious and worthwhile work the Red Cross does.
  

... Cobuild

bring home: Get to the heart of a matter, make perfectly clear. 

• The crash brought home the danger of drinking and driving.  
• This term uses home in the figurative sense of "touching someone or something closely." [Second half of 1800s] 

.... http://www.answers.com/topic/bring-home

bring something home to somebody: to make someone understand something much more clearly than they did before, especially something unpleasant 

• These photographs finally brought home to us the terrible realities of war. 
• It took an international crisis to bring it home to British politicians that they desperately needed allies in Europe.
  

.... http://idioms.thefreedictionary.com/bring+home+to