Whether you are Arab or Azam, your heart will not bear witness to 'La Ilaha Illa' until you speak it.

This profound couplet speaks to the difference between outward declaration and inner conviction. Allama Iqbal suggests that the truth—the belief in the Oneness of God—cannot be proven merely through eloquent words or external claims. The real, undeniable proof, the ultimate witness, must come from the depths of the heart. It is a powerful reminder that genuine belief resides not in the tongue, but in the soul.