“in the first year of his reign I, Daniel, understood by the books the number of the years specified by the word of the Lord through Jeremiah the prophet, that He would accomplish seventy years in the desolations of Jerusalem” (Daniel 9:2 NKJV).

“In the first year” of Darius’ reign, Daniel was moved to make a careful study of the “books” of Scripture. Surely the sudden shift of world domination by the Babylonians, to the now conquering Persians, made him wonder how it would affect the future of Israel. As he studied the book of Jeremiah, he began to understand that the Lord’s “seventy years” of “desolations” for Jerusalem were nearing an end (see Jer. 25:11-12). The seventy years of captivity was God’s discipline for not keeping the Sabbath Year (Lev. 25:4), allowing the land to rest from planting every seven years. Since they had not obeyed the Sabbath Year for 490 years (490/7 = 70), God rested the land Himself for seventy years (2 Chron. 36:20-21).
 
The understanding that Daniel derived from his careful Bible study drove him to his knees in prayers of confession and repentance on behalf of his people. He began to see the light at the end of the tunnel. He made supplication to the Lord that He might “turn” His “anger” and “fury” away from Jerusalem (Dan. 9:16). And the Lord answered Daniel’s prayers. For that same year, Cyrus the Great (Possibly another name for Darius. Or Darius served under Cyrus) would be moved by the Lord to make a decree allowing the Jews to return to Jerusalem (2 Chron. 36:22-23).
 
We can learn much about discerning the will of God from Daniel. Bible study with much prayer is key for those that would hear direction from the Lord.