This time so integrally indispensable summary is submitted here for undestanding very problemattic our nature as enigmatic attracting us and as waht we should iteratively see its essence.

Principly we can have only V letter relation or relevence at making now main with past and future. Because we have no reason to regard ascertained relation nor relevance between past and future as understandable truth to these relevance in essence. Because we can have both past and future only through having consciouness to now so arbitrarily at both premise to all time system and each occasionally perceptive understanding e.g. team working necessity to share common past and future with pbjective cognition at one unit or group. Then intrinsicly and essentially past, present as now and future in turn must never be necessary truth, it is just only conventional thinking circuit depending idea. 
Then, substentially only next diagram displaying consiousness must be incarnated at our personal life for anybody.

                 Substantially irrelevant mutually together between past and future directly
　                                                    
                                                        〇　..............　 〇
　                                                   Past 　　　　Future
　　                                                 　　↖　　↗
　　　　　　　　　　　　　　　　　　　〇
　　　　　　　　　　　　　　　　　　  Now 

Relation between past and future fundamentally has no assurance nor identified evidence to be joinned together mutually, for the present. Then we could call these three concepts only with V letter, not at triangle.

Fundamentally, structually, there must never be direct reation between past and future.
E.g. the birth of Jesus Christ and new corona virus pandemic worldwide peril since 2020 to nowadays. Then between past and future, only suppositive dotted line could be given.
In other words, that relation means only for our time system understanding, no other things must have no relation at this relevance with past and now, it must be used only for our mind, as for only memory arranging, rational understanding aim. This is so integrally vital truth to us. Hence V letter diagram strucuture must be the sole appropriate display.

And, necessarily if we aim our mind's holding focusing consciousness at absolutely seen never switchable time transiting, our holding only now as our practical perceptive consiousness to our own act and memorizablly grasping our act' done date and its knowing pulled from our own memory or record must be displayed at next diagram.

　　　　　　　　　　　　
　〇　　　　　　〇　　　　　　　〇　　　　　〇
　Past 　　　　Future　　　　　Past 　　　　Future

　　↖　　　　↗　　　⇨　　　　　↖　　　↗　　　⇨..........the same iteration in turn.
　　　　〇　　　　　　　　　　　　　　〇
　　　　Now　　　　　　　　　　　　Now
　　　　

Then at this series, previously I used a word with triple, either triangle, but that definition is hastening error, it should be used only for our kind of falsehood around defining time system's nature so roughly, because actually we have triangle realtion with now, past and future, only for our tims system's mechanism cognitive premise understanding, and really we have only consistently now, and with its absolute premise at our communication, anytime we are at habitual regulation to us either past and now. Only at this context, we could use two things. Nevertheless, we can use both not now time terms with past and future, we can know in no exception that we must die sometime in lifetime of us, pesronally, and for recognition to that destinial fact and having expediency to economize futile expenditure of spending time as waste time holding with awkwardly not so considerable way to spend the limited time.

At Part15, as I mantioned, Taniguch suggested to me at our conversation about memory and habit in discernment or each cognition in brain, in terms of us as are having concsiousness at being mortal and someday we are dying, at least for us, very earlier days at infantile ages. Meanwhile, mamals usually have no idea around it, of course, either they can be perceptive and perceived at nearly dying with the moment which comes so close as upcoming dead moment in premonition, but they untile the moment usually have no consciousness nor are never conscious about that absolute factuall truth. That thing could be explicable with Taniguch's suggestion that they all are never capable to distinguish memory as the matter as they have memory in mind and their really acting habitual cognition in obvious distinction as mutually diffrentiated items or conceptual understanding.

To some extent, we can easily discern conceptual meaning gap between memory or memorized ideas and daily habitual act's consciousness to be promoted by our impulse or motion to be driven to act something in doing really.
With these serially all process in our capabilty must make us accompanied with our mind's necessity to se date, as time system for keeping our society so stable in team work practicing and social decsion in execution at any site.
Eventually, it is the ultimately absolute truth that what we can know our future death so personally to anyone in no exception must make us time system in rationally understandable common truth.
(to be continued)

Feb. 1st. 2021

Additonal comment; If we have very serious despair to own life at future prospect, future is consistently only darkness or nothing but that we can have conviction only to past, then onlt pasts memory could be everything.
Meanwhile, if we have some anticipation and hope to the future of us, only future is hopeful and pasts all mean very small.
Actually we in turn have both upper minds iteratively. 
And, now=being present (or presence) means just, mind's intention as consciousness to us as personally to our being aspect, with these we are having any idea.

Otherwise, if we persist in triangle order, we just unconsciously would be bound to spatial commonsense and apply it inappropriately to our own understanding to time system. However, actually time system read or interpreted with our time cognition and perception radically so different from spatial order as only space provides us so decsively at our daily life.