Consider... consider. Figure of speech Anadiplosis. App-6.
from this day: i.e. from the day the foundation of the Temple was laid. From this time, subsequently, things would be different, and Jehovah would bless them, as promised in Haggai 2:19.
Related Commentaries of Haggai 2:18
Haggai 2:18
18 Consider now from this day and upward, from the four and twentieth day of the ninth month, even from the day that the foundation of the LORD'S temple was laid, consider it.