First of all I am going to go through each one individually, and if I remember, and I haven't fried my brain at that stage (it is already fried... and I am physically fried, too) I will do a more overall what I think type thing. This is going to not make sense, I can just feel it right now, but here goes.
Four of Cups - not noticing things around you. You are withdrawn, self-absorbed, possibly a little bored and depressed. It just reminds me when you get yourself in such a state of boredom, you just can't be bothered, nothing will get your interest! Depressed is like when you really do have a hard time noticing the good stuff around you, and sometimes you have to physically force yourself to do something that you would normally enjoy, but you have no enthusiasm for it that stage, I have depression, and I know how that feels. I have been told that you really need to do stuff that you would normally enjoy, although you won't enjoy it at the time, and you really do not have the enthusiasm for it. Sometimes it could be as simple as not noticing a good thing even though it is right in front of your face!
Four of Wands - a time of rest after some completion, but not final completion. You have done a lot, and now it is time to put your feet up, be comfortable, get together with your family and friends. It is sort of like a welcoming party, as such, after being out in the world doing your own thing, and you come back home. Important not to take this too far of course.
Four of Pentacles - keeping things to yourself, whether that is your money, other possessions, your feelings and your thoughts. By doing so, you are not going to lose anything, but at the same time you are not going to gain anything either. Not wanting to share with others.
Four of Swords - a time to rest after a difficult and stressful time. A time when you can get to look within yourself, and do some meditation, as such, so you can be more attune with the Higher Power, maybe, I thought that this is relevant since it is in a church! Well, obviously, since he is lying on a coffin, it is about letting go of something, and having a "re-birth" of some sort. A time to just be, be by yourself, be introspective, retrospective, gain greater self-awareness, self-worth, and all of that.
Overall, I tend to think that Fours seems to indicate a time when there is a lull, not really inertia, but just being, I guess. I tend to view this as a time to be by yourself, type card, not really sure if that is right or not. Mind you the only card that is not like this is Four of Wands! But it can be, I guess.
This relates to The Emperor, so that indicates that you are the one that makes the rules, you stick to your rules, and expect others to be around you to do the same. It can be about having a lot of experience, so that you can impart your knowledge gained through experiences as advice. Also, to a certain degree, Death, which is 13, reduced to 4, so that is ending of something that in turn can bring about a brand new beginning, that can be brighter. Possibly.