There is a word (sehnsucht) that describes a deep and ineffable longing for something beyond description, joyous and enjoyable beyond anything in this World, that 'haunts' many people: like CS Lewis for example. I myself feel it so strongly that I feel joy and ecstasy is rendered tiny next to my hope but I fear it doesn't exist because my notion of it is so vague ( though certain things inspire it). A lot of Christians say this is the hope we were born for but there is no evidence for that scale of joy in the Bible ( it says there is no pain as well as other negation a in Heaven and mentions joy here and there). That makes me think there must be philosophical 'evidence' for so many to believe that...but I also wonder if such a desire is not, itself, proof? Are we born with a futile longing that dwarfs all other desires?
Some of us are not born with such a futile longing, and there is no particular reason to suppose that such desires prove that what one desires exists or is a good idea, any more than desire to eat sweet things proves that we should eat candy all the time, or intense desires by the mentally unsound prove that they have a different God or live in a different universe than do we.
I am not exceedingly familiar with Christian philosophy and apologetics, but if such was taken as proof (rather than as rather weak confirming evidence), it would be an invalid argument. When I have encountered the argument, it has always been in that context: not a proof, but a gentle suggestion that supports that world-view.
Your desire for that deep state of joy exists as a reality for many including some I know and have known. And there are definite ways to achieve it. One of them is being in the present for as long as you can which takes you in a state of acceptance and simply being. But once you practice this you realize it is easier said than done. But this is only one technique which you will find in several selfhelp books. There are many other lesser known methods which I have learnt. Although I have not reached the state you describe, I have certainly felt it for decent durations. I can direct you to learn those.