I shall not die, but live,.... Not that he should never die, David knew he should; but that his present afflictions would not issue in death; or he should not die by the hands of his enemies, he sometimes feared he should; but now believed he should live, as he did, to a good old age: he knew he should live spiritually and eternally, and not die a second death; and so may all true believers and members of Christ say.
Yea, these words may be considered as the words of Christ; who, though he came into the world to die, and did die for the sins of his people; yet he knew he should not die before his time, nor should he continue long under the power of death; but should live again, and live for evermore, and not die; death should have no more dominion over him; see Ps 16:10;and declare the works of the Lord; the wonderful appearances of God in a providential way, and all his marvellous works of grace; as David did, and as all the people of God more or less do; and which is the end of their living; not to eat and drink, and gratify their carnal senses, but to glorify God, by declaring what he has done for themselves and others.