Charles H. Spurgeon on Psalms 73:26

God is the strength of my heart, and my portion for ever. The Hebrew carrieth it, but God is the rock of my heart, i.e., a sure, strong, and immovable foundation to build upon. Though the winds may blow, and the waves beat, when the storm of death cometh, yet I need not fear that the house of my heart will fall, for it is built on a sure foundation: God is the rock of my heart. The strongest child that God hath is not able to stand alone; like the hop or ivy, he must have somewhat to support him, or he is presently on the ground. Of all seasons, the Christian hath most need of succour at his dying hour; then he must take his leave of all his comforts on earth, and then he shall be sure of the sharpest conflicts from hell, and therefore, it is impossible he should hold out without extraordinary help from heaven. But the psalmist had armour of proof ready, wherewith to encounter his last enemy. As weak and fearful a child as he was, he durst venture a walk in the dark entry of death, having his Father by the hand: "Though I walk through the valley of the shadow of death, I will fear no evil: for thou art with me; thy rod and thy staff they comfort me, "Psalm 23. Though at the troubles of my life, and my trial at death, my heart is ready to fail me, yet I have a strong cordial which will cheer me in my saddest condition: God is the strength of my heart.

And my portion. It is a metaphor taken from the ancient custom among the Jews, of dividing inheritances, whereby every one had his allotted portion; as if he had said, God is not only my rock to defend me from those tempests which assault me, and, thereby, my freedom from evil; but he is also my portion, to supply my necessities, and to give me the fruition of all good. Others, indeed, have their parts on this side the land of promise, but the author of all portions is the matter of my portion. My portion doth not lie in the rubbish and lumber, as theirs doth whose portion is in this life, be they never so large; but my portion containeth him whom the heavens, and heaven of heavens, can never contain. God is the strength of my heart, and my portion for ever; not for a year, or an age, or a million of ages, but for eternity. Though others' portions, like roses, the fuller they blow, the sooner they shed; they are worsted often by their pride, and wasted through their prodigality, so that at last they come to want —and surely death always rends their persons and portions asunder; yet my portion will be ever full, without diminution. Without alteration, this God will be my God for ever and ever, my guide and aid unto death; nay, death, which dissolves so many bonds, and unties such close knots, shall never part me and my portion, but give me a perfect and everlasting possession of it. George Swinnock.