Chronology has robbed us of the nature of God's existence. For in those moments of our experiential ecstasy, however great they may be, in the end are still moments - and moments fade. Not only do moments fade, but they are also tampered with in later moments by the human psyche. They are made to be better than they ever really were.
When we enter eternity we are placed in the direct presence of God (which is outside of the realm of time). Those moments of ecstasy which we could never hold on to, however much we have convinced ourselves that we want to, are really just moments. The reason why moments fade is because if they didn't they would get old and tiresome.
When we reach eternity and experience ecstasy with God, we will not be trapped in a moment, but freed from chronology and will be living in God's territory - the very absence of time.
We were designed for this ecstasy and are blessed to get glimpses of it now on this earth. But only glimpses for now. One day we will experience it in all completeness, but until that day comes...
We must ride the highs, receive the grace from the lows, and see God in all of it. After all, the journey is the destination.