Аггей 1:5

After rebutting the untenable grounds of excuse, Haggai calls attention in vv. 5, 6 to the curse with which God has punished, and is still punishing, the neglect of His house. Hag 1:5. "And now, thus saith Jehovah of hosts, Set your heart upon your ways. Hag 1:6. Ye have sowed much, and brought in little: ye eat, and not for satisfaction; drink, and not to be filled with drink: ye clothe yourselves, and it does not serve for warming; and the labourer for wages works for wages into a purse pierced with holes." שׂימוּ לבבכם, a favourite formula with Haggai (cf. v. 7 and Hag 2:15, Hag 2:18). To set the heart upon one's ways, i.e., to consider one's conduct, and lay it to heart. The ways are the conduct, with its results. J. H. Michaelis has given it correctly, "To your designs and actions, and their consequences." In their ways, hitherto, they have reaped no blessing: they have sowed much, but brought only a little into their barns. הבא, inf. abs., to bring in what has been reaped, or bring it home. What is here stated must not be restricted to the last two harvests which they had had under the reign of Darius, as Koehler supposes, but applies, according to Hag 2:15-17, to the harvests of many years, which had turned out very badly. The inf. abs., which is used in the place of the finite verb and determined by it, is continued in the clauses which follow, אכול, etc. The meaning of these clauses is, not that the small harvest was not sufficient to feed and clothe the people thoroughly, so that they had to "cut their coat according to their cloth," as Maurer and Hitzig suppose, but that even in their use of the little that had been reaped, the blessing of God was wanting, as is not only evident from the words themselves, but placed beyond the possibility of doubt by Hag 1:9.…

In this chapter, after the preamble of the prophecy, we have, I. A reproof of the people of the Jews for their dilatoriness and slothfulness in building the temple, which had provoked God to contend with them by the judgment of famine and scarcity, with an exhortation to them to resume that good work and to prosecute it in good earnest (Hag 1:1-11). II. The good success of this sermon, appearing in the people's return and close application to that work, wherein the prophet, in God's name, animated and encouraged them, assuring them that God was with them (Hag 1:12-15).

1:5 Look at what’s happening to you (literally Set your heart on these matters): For the Hebrews, the heart is the place where thinking, feeling, and willing all occur. So this command (also 1:7; 2:15, 18) calls upon the people to think carefully and draw the proper conclusions about the connection between what’s happening to them (drought and poverty, 1:6) and their failure to restore proper worship of the Lord (1:8-9).