It seems that in an infinite potential, all things would "Be". Thus all things are truth for that part of the infinite mind that believes it so.
If there was to be one Truth I would have to name it Infinite, or Love, or One. I think that's what you are reaching for in your words. That ineffible feeling of knowingness without thought. I don't see anything wrong with labelling that Infinite Love...as Truth. As long as one accepts all other parts of the One as truth, also. To deny, or disallow even in thought, any part of the whole seems to be (to me) denying an aspect of the infinite creator. It would be putting a limit on what is limitless. For with infinity why not allow everything to exist and everyone to explore whatever it is they wish to. That's the way I see it anyway. It's not the easiest thing to put into application given our human programs we were entrained with from birth, but I do try my best.
I do see "appreciation" as coming closer to that spiritual level of love. The words I used were kind of the order I see it progressing into. Allowance and acceptance seem to be close to the same in this context. After which you would gain understanding because you have allowed that something else to exist within you. That understanding would then lead to appreciation. After that it basically becomes apart of you and no longer appears as separate. You would own that which before appeared separate. It may be someone's personality or someone's personal truth. That doesn't mean it's the 'right' thing for you in the moment but you still have allowed it thus expanding yourself.
Maybe the feeling of Love would be the feeling of that ever expanding self that wishes to include all that one comes into contact with.
To answer your last question I would say Yes, sort of. Unfortunately, it's a lonely road. As for being shared, there are few that wish to be at that level of allowance of all that one experiences. Who I trully am is rarely accepted by others. I have to basically go to whatever point someone else is at in order for them to see me as a friend. When I am trully myself it seems a vacuum is created between me and another person. I have to be the one to transverse that vacuum to where they are. I suppose they do appreciate the effort. It seems though, that is as far as it usually goes on their part.
Not sure if I actually addressed your questions. It's quite an ambigious topic when attempting to define it with our words.