Charles H. Spurgeon on Psalms 147:15

He sendeth forth his commandment upon earth. His messages fly throughout his dominions: upon earth his warrants are executed as well as in heaven. From his church his word goes forth; from Zion he missions the nations with the word of life. His word runneth very swiftly: his purposes of love are speedily accomplished. Oriental monarchs laboured hard to establish rapid postal communication; the desire, will, and command of the Lord flash in an instant from pole to pole, yea, from heaven to earth. We who dwell in the centre of the Lord's dominions may exceedingly rejoice that to the utmost extremity of the realm the divine commandment speeds with sure result, and is not hindered by distance or time. The Lord can deliver his people right speedily, or send them supplies immediately from his courts above. God's commands in nature and providence are fiats against which no opposition is ever raised; say, rather, to effect which all things rush onward with alacrity. The expressions in the text are so distinctly in the present that they are meant to teach us the present mission and efficiency of the word of the Lord, and thus to prompt us to present praise.