Life eternal is more about quality than quantity of existence. It is true, of course, that we shall everlastingly know the Father and the Son as revealed by the Holy Spirit. However, a state of being approaches for the born again believer in the Lord Jesus Christ when "there should be time no longer" (Revelation 10:6).
We have no frame of reference for such an existence wherein we are not dominated by the sequential passage of moments. We do, however, know the primary occupation of life eternal. We shall know the Father and the Son as revealed by the Holy Spirit, because "this is life eternal." This is actually our primary occupation even at present, but much distracts and conflicts with the holy endeavor (including the constraints of time). There will be no such challenge in eternity, and amid the infinite variety of activity that will fill our lives and existence, all will present to us fresh illumination upon the glory of the triune God. Unto our glorified sensibilities, the Holy Spirit will eternally present to us the beauty of love as it exists in the Father and the Son, and wondrously, as it exists in our redeemed being. The display will never end because the being of God is infinite in goodness, and because no clock will demand that we must move on to another endeavor or responsibility.
Perhaps we might say that every "moment" of eternity will be as an eternity in and of itself. Beholding some aspect of the wonder of Father, Son, and Holy Spirit will so fill us that the joy of the experience will, as it were, never leave us, and we will never leave it. Again, we have no frame of reference for such glory, but we do have the promise that our life will be as abundant as He who is our life. And we know that the heart of all matters will the heart of reality. We shall behold the Father and the Son as revealed by the Holy Spirit.
While limited by time, space, and earthly realities, our eternal journey into the heart of God has already begun if we have believed. This very day and moment offer to us the possibility of experiencing the defining essence of our lives. Life eternal is, again, far more about the quality of our being than its quantity. Therefore, as we walk with God by faith, the light of forever can transform the moments of time into something far more than we normally expect them to be. We may "see" something, or rather Someone, who causes the depths of our being to arise and then to kneel in the splendor of an eternally ancient glory that is now revealed to us, and even more, in us. The prospect is thrilling, and let us open our eyes in the expectation that the Spirit of God is more than willing to presently display the Father and the Son unto and within us.
"The Father loveth the Son, and hath given all things into His hand. He that believeth on the Son hath everlasting life."
"One thing have I desired of the LORD, that will I seek after; that I may dwell in the house of the LORD all the days of my life, to behold the beauty of the LORD, and to inquire in His temple."