When Pharaoh hears this, he believes and accepts Joseph’s interpretation, and he also believes the dream is truly a message from God to warn him about future events. It is a Gentile who believes.
Joseph had come to Egypt aged seventeen and he is now thirty. He has had thirteen years of training in the Lord’s school of hardship. We learn that God gives particularly rigorous training to those he calls to the highest and most difficult tasks, and he does not use a novice, or someone who has not been adequately prepared for such service. Joseph was not going to be distracted from his service to God because of the sudden privileges he was given, or the luxury with which he was now surrounded.
In all this Joseph would have seen the hand of God, and would have watched with wonder as the pieces began to fall into place for the fulfilment of his dream. He learnt that there is nothing God cannot do. His dream is in a sense governing and defining his whole life, and all that happens to him gets related back to it. So it is with the believer who has received a heavenly calling. He does not understand all that happens to him, but he can see some of the ways in which God is bringing about his perfect will in his life.
Joseph was as far as we know, the sole possessor of spiritual light in Egypt. You may be the only one in your family, school, office, to believe in Christ. You learn how you deploy your faith wisely. You may be the only one those people will ever have contact with who can bring them the message of salvation.