Philosophical statement made when you put life in perspective, you acknowledge that you are truly blessed, you are truly lucky, and you have all but great things ahead of you.
Hypothetical: You are surrounded by all your friends, it's your birthday, you are having a great time, before you take a shot, you reminisce....
Being filled with happiness inside your heart, as you see someone that you haven't seen in awhile that you truly missed.
It can be said like this:"its good to see you again." translating into you having missed their presence and being so glad to see them again.
I missed my best friend so much, that I was filled with joy when I got to see her again, and it meant so much to me.