The queen of Sheba represents a fulfillment of God’s plan to use the Israelites to make himself known throughout all the earth (Exodus 9:16). “When the queen of Sheba heard of the fame of Solomon concerning the name of the LORD, she came to prove him with hard questions” (1 Kings 10:1). The word translated prove, nacah means to test (5254). The queen of Sheba wanted to know God and so she went to see for herself if Solomon was speaking the truth, if he really knew God in a personal way.
As a result of her visit, the queen of Sheba became a believer. It says in 1 Kings 10:6-7, “she said to the king, It was a true report that I heard in mine own land of thy acts and of thy wisdom. Howbeit I believed not the words, until I came, and mine eyes had seen it.” The word translated believed, aman is the same word used in Genesis 15:6 where it says that Abraham “believed in the LORD.” The queen of Sheba “communed” with Solomon (1 Kings 10:2). She and Solomon had a lengthy conversation about spiritual matters. Solomon revealed to her spiritual truths that opened her heart to God.
During the queen of Sheba’s visit, I believe Solomon was in the role of preacher and it is possible that the book of Ecclesiastes is a record of what Solomon shared with her during their time together. At the end of the book of Ecclesiastes, Solomon talks about having a relationship with God. He said in Ecclesiastes 12:1, “Remember now thy Creator in the days of thy youth” and after depicting the process of aging stated, “the spirit shall return unto God who gave it” (Ecclesiastes 12:7). Solomon’s emphasis of life lived apart from God in the book of Ecclesiastes and his conclusion that a relationship with God is necessary indicates that he was trying to convert whoever he was speaking to and he was successful in doing that with the queen of Sheba.