Let me tell you something you should have already known.
Again and again the two fundamental concepts are intertwined and confused when unmistakably and most startlingly, they are in fact two separate entities that work like a fraternal pair of twins- Understanding and Accepting.
Definition of acceptance:
The mental attitude that something is believable and should be accepted as true.
The disposition to tolerate or accept people or situations.
Definition of understanding:
To perceive and comprehend the nature and significance of; grasp.
To know thoroughly by close contact or long experience with.
To grasp or comprehend the meaning intended or expressed by (another).
So the general belief in laymans terms would be: If you understand something, you are bound to accept it. If you accept something, it must mean that you understand it. True or false?
Lets take a hypothetical situation for an example, even though we would fail GP doing that. Heh. If someone murdered a person, and the reason for that murder was self-defense, would you understand the reason behind the murder and the whole act of murdering itself as well?
Here are a few possible answers:
1) Pity the murderer, and with complete understanding, accept and the reason for murder and the act of murdering.
2) Understand everything logically yet still be unable to accept the fact that a murder took place irregardless of the rational grounds behind it, since a life is indeed a life.
3) Accept that murdering is part and parcel of life but not understand the reason behind murdering. (Gangster talking here.)
4) Do not know why one has to murder anyway or why there would be reasons to murder someone else. Isnt there a better non-violent way to solve all problems. (Bimbo talking here.)
So in the first answer, one understands and accepts.
In the second answer one understands but cannot accept.
In the third answer one accepts but cannot understand.
And in the fourth answer, one cannot understand and cannot accept.
Haha... From here we can perceive that the usual human being would be able to choose only from four main options of answers, which illustrates how the concepts of understanding and accepting something works differently in our minds.
The only reason why they are assumed to be the equivalent of each other is simply because they are undeniably associated with each other. But should we allow the relationship both concepts hold to misguide us into a false impression that both are identical? It is true to say that they are hard to tell apart and the lines between them are in shades of grey and diversely open-ended, but nonetheless, they are truly singular and individualistic. If one is able to see this, one would also become more aware of the impulses and inexplicable paths that the human consciousness takes in the approach to conventional matters with conventional actions subscribed to it. Most importantly, one would be able to comprehend the basis of certain incongruities of people. To put it simply, why people act the way they act, and do what they do.
The answer I would have given to the above hypothesis would be: Factionalize it into two parts of a conclusion. Step one would be to totally understand the reason behind the murder having been completely necessary for the survival of oneself. Step two, would be that regardless of step one's analysis, still be unable to accept the act of murder since murdering is violent and brutal and a life is indeed a life. Wrong? So what?
What Im trying to say is when a person understands something it does not naturally mean that it would lead that person to accepting something. I can understand Hinduism and even terrorism, but do I accept it? No.
Conversely, when a person accepts something, let's say accepts X (X being a person or an object inconsequential detail), one cannot immediately jump to the assumption that that person must have thoroughly or even minimally understood X. I can love and accept a person, but does it really go to show that I understand that person entirely? I can accept smoking and do it, but does it really mean that I absolutely understand how bad smoking is? Does it?