God gave ancient Israel the system of casting lots as a means of determining His will in doubtful matters (Num. 33:54; I Sam. 14:42; I Chron. 24:5). God would guide the outcome so as to reveal His will. This method was still in use in the time of Christ. The disciples used casting lots in determining whom God was selecting to fill the office vacated by Judas (Acts 1:15-26).
After the eventful Pentecost of A.D. 31, no further mention is made of casting lots. The apostles depended upon direct guidance by the Holy Spirit, which, among other things, was to guide God’s people into all truth (Acts 2 and John 16:13). Please also notice Acts 6:1-8; 13:1-3; 15:19, 28; and 16:6.
Today, as in early New Testament times, God uses the power of His Holy Spirit through His chosen ministers to reveal His will in important matters of concern to the Church on which the Scriptures give no definite command.