Jehovah will keep thy going out and thy coming in. The sense is, Whatever thou shalt undertake or engage in during thy life shall come to a happy and successful termination. God no doubt directs by his Holy Spirit the, deliberations of his servants; but it appears to me, that this passage is rather to be referred to prosperous issues. If, however, any one would give it a more extended meaning I have no objection. It is enough for me to embrace that sense which is indisputably certain and solid, That God will be the continual guide of his people, so that stretching out his hand to them he will conduct them according to their hearts' desire from the beginning even to the end. Farther, it is of importance to mark the reason why the Prophet repeats so often what he had briefly and in one word expressed with sufficient plainness. Such repetition seems at first sight superfluous; but when we consider how difficult it is to correct our distrust, it will be easily perceived that he does not improperly dwell upon the commendation of the divine providence. How few are to be found who yield to God the honor of being a keeper, in order to their being thence assured of their safety, and led to call upon him in the midst of their perils! On the contrary, even when we seem to have largely experienced what this protection of God implies, we yet instantly tremble at the noise of a leaf falling from a tree, as if God had quite forgotten us. Being then entangled in so many unholy misgivings, and so much inclined to distrust, we are taught from the passage that if a sentence couched in a few words does not suffice us, we should gather together whatever may be found throughout the whole Scriptures concerning the providence of God, until this doctrine-" That God always keeps watch for us" -- is deeply rooted in our hearts; so that depending upon his guardianship alone we may bid adieu to all the vain confidences of the world.

The Lord shall preserve thou going out and thy coming in - Preserve thee in going out and coming in; in going from thy dwelling, and returning to it; in going from home and coming back; that is, everywhere, and at all times. Compare Deuteronomy 28:6. See the notes also at Job 5:24. "From this time forth, and even forevermore." Through this life and for ever. This is the gracious assurance which is made to all who put their trust in God. At home and abroad; in the house, in the field, and by the way; on the land and on the ocean; in their native country and in climes remote; on earth, in the grave, and in the eternal world, they are always safe. No evil that will endanger their salvation can befal them; nothing can happen to them here but what God shall see to be conducive to their ultimate good; and in the heavenly world they shall be safe forever from every kind of evil, for in that world there will be no sin, and consequently no need of discipline to prepare them for the future.
"In foreign realms, and lands remote,
Supported by thy care,
Through burning climes they pass unhurt,
And breathe in tainted air.
When by the dreadful tempest borne,
High on the broken wave,
They know thou art not slow to hear,
Nor impotent to save.
The storm is laid - the winds retire,
Obedient to thy will;
The sea that roars at thy command,
At thy command is still.
In midst of dangers, fears, and death,
Thy goodness we'll adore;
We'll praise thee for thy mercies past,
And humbly hope for more.
Our life, while thou preserv'st that life,
Thy sacrifice shall be;
And death, when death shall be our lot,
Shall join our souls to thee."
Addison's Spec.

Thy going out and thy coming in - Night and day - in all thy business and undertakings; and this through the whole course of thy life: for evermore.

The LORD shall preserve thy (d) going out and thy coming in from this time forth, and even for evermore.
(d) Whatever you attempt will have good success.

The Lord shall preserve thy going out, and thy coming in,.... In transacting all the business of life, in going in and out about it; in all ways, works, and conversation; in journeying and travelling; in all affairs, civil and religious; and not only preserve, but prosper in all, Psalm 1:3; the Lord blessing him, coming in and going out, Deuteronomy 28:6; and such, with the poet (x), are said to go with a good or prosperous foot. And such persons, in the Punic language, are called Namphanians, as Austin observes (y); who says the word signifies a man of a good foot: and the word seems to be the contraction of , which signifies "his good" or "pleasant foot" (z); and so one that, wherever he comes and goes, things prosper with him, and with those that are in connection with him: such an one was Jacob in the house of Laban, whom the Lord blessed, as he says, "since my coming", or at "my foot"; see Gill on Genesis 30:30; and such a foot Joseph had wherever he went, Genesis 39:5. Arama interprets it of a man's going out into the air of this world, and of his entrance into the world to come. The Targum is,
"the Lord will keep thy going out to business, and thy coming in to study in the law.''
from this time forth, and even for evermore; for the Lord not only preserves his people in life and at death, but in heaven, to all eternity; in the utmost safety and peace from all molestations by men or devils, and from their wrath and malice: not only his purpose and decree, but his power and providence, are the vast gulf between the one and the other; by means of which the wicked cease from troubling, and the weary are at rest, Luke 16:26.
(x) Virgil. Aeneid. l. 8. "Adi pede sacra secundo"; & l. 10. "adsis pede diva secundo." (y) Epist. 44. (z) Vid. Sterringae Philol. Sacr. p. 169. Reinesium de Lingua Punica, c. 8. s. 10.

thy going out, &c.--all thy ways (Deuteronomy 28:19; Psalm 104:23).
evermore--includes a future state.