Ancient nations were often enslaved to magicians and fortune-tellers, constantly trying to predict and control their destiny based on mystical forecasts. In stark contrast, the Torah demands absolute loyalty and complete trust in the Creator. This loyalty requires a specific kind of inner perfection. It is a state of being unblemished, much like a sacrifice without any physical defect [רמב״ן]. It requires an undivided heart, functioning like a completely full vessel that leaves absolutely no room for the fear of foreign powers [חזקוני]. It also demands a clear, rational mind that refuses to be drawn after nonsense and foolishness [רלב״ג, תורה תמימה בשם הרמב״ם]. Living this way creates a close, direct, and constant walk with the Creator.
The primary approach among commentators is that this serves as a strict warning against trying to uncover the future through astrologers, casting lots, or dark forces. Rather than attempting to outsmart God by discovering what lies ahead, a person should live with quiet acceptance. They must receive whatever comes their way with peace, trusting that God does what is good [רש״י, בכור שור]. When guidance for the future is truly needed, it should only be sought through God's legitimate prophets or the Urim and Thummim [רמב״ן, ספורנו].
This prohibition reveals a deep perspective on divine providence and fate. The commentators agree that God fully controls the stars and constellations and can alter them at His will. Even if an astrologer predicts a negative outcome, or if God temporarily grants power to dark forces in order to test humanity [רשב״ם], a person who holds fast to God is never subject to blind fate. As a person grows closer to serving God, they are freed from the constraints of astrological luck. This was the case with Abraham, whose stars indicated he would not have children, yet God entirely reversed his destiny [אור החיים, חומש קה״ת]. Therefore, one should never fear fortune-tellers. Instead, a person must dedicate their heart completely to the belief that God alone orchestrates everything [רמב״ן, ביאור יש״ר]. Even in times of deep distress, when the urge to find answers and security is overwhelming, one must strictly avoid turning to foreign powers [ביאור שטיינזלץ].
Beyond being a strict command, some commentators read this as a profound promise. If a person chooses to walk in simplicity, refuses to investigate the future, and focuses entirely on doing God's will in the present moment [רש״ר הירש], they will receive a great reward. The reward for this unwavering trust is that the person will merit to live constantly under God's direct, personal providence. They will become His portion and will lack absolutely nothing [העמק דבר, מלבי״ם, גור אריה, מזרחי].