There are three options about our cup. Half full. Half empty. Or...
"My cup runneth over" (Psalm 23:5).
The Bible believing Christian recognizes that David did not refer to a perpetually full bank account, a body always brimming with health, or a quiver full of solution arrows that immediately pierce and destroy the problems of life. Nothing in Scripture, and particularly the New Testament, leads us to believe that faith in the Lord Jesus Christ promises in our earthly lives that we will always experience such outward abundance.
"Moreover, brethren, we do you to wit of the grace of God bestowed on the churches of Macedonia; how that in a great trial of affliction the abundance of their joy and their deep poverty abounded unto the riches of their liberality. For to their power, I bear record, yea, and beyond their power they were willing of themselves; praying us with much entreaty that we would receive the gift, and take upon us the fellowship of the ministering to the saints" (II Corinthians 8:1-4).
The Apostle Paul strongly affirms the Macedonian believers, whose generosity proceeded not from material abundance, but from "deep poverty." In the outward sense, their cups appeared to be less than even half full. In that which matters, however, the Macedonians knew an "abundance of joy" in the midst of "a great trial of affliction." Their cup ran over, that is, the cup of their hearts. This is the abundance presently promised to believers, the filling of our hearts by the living God Himself in the person of the Holy Spirit. He is there in the center of our being, dwelling in more love, life, and enabling than we can imagine.
"Now unto Him that is able to do exceeding abundantly above all that we ask or think, according to the power that worketh in us" (Ephesians 3:20).
Note the scene of our Lord's superabundant working - "the power that worketh in us." Our spirits teem with the life of the risen Lord Jesus, whether we know it or not, whether we feel it or not, and whether we act like it or not. He is present within us in the same power by which He arose from the dead (Ephesians 1:19-20). Our cup is full, no, it is more than full, even as the Lord Jesus declared, "He that believeth on Me, as the Scriptures hath said, out of His belly shall flow rivers of living water" (John 7:38).
Sometimes when there has not seemed to be enough money, health, strength, or quick solutions to difficulty, I have acknowledged such to our Heavenly Father. And then I have added, "But Father, there is enough You!" More than enough, actually, "exceeding, abundantly above all we ask or think" enough. We are temples of the living God if we have believed in the Lord Jesus, and while Satan, the world, and the flesh would tell us that our cup is not even half full, the truth of the matter is that our hearts are bursting at the seams with a Person so vast that "the heaven of heavens cannot contain Thee!" (I Kings 8:27). Somehow we do, and it is a miracle. It is also the truth in this moment and forever. Therefore, whatever the account, the body, or the challenge may indicate, we can and must affirm to our Lord which much assurance and joy, "There is enough You!" Our cup "runneth over" - with God Himself.
"The love of God is shed abroad in our hearts by the Holy Spirit which is given unto us."
"I know both how to be abased, and I know how to abound: every where and in all things I am instructed both to be full and to be hungry, both to abound and to suffer need."