What is the ruling regarding worldly desires and instincts overpowering the worshiper during prayer, coupled with the difficulty of fending them off?

The answer to the question about obsessive thoughts and distractions during prayer is that the worshipper must be present in heart and humble, establishing the prayer outwardly by completing its pillars and conditions, and inwardly through humility and presence of heart. A person only gets from their prayer what they comprehend. Obsessive thoughts are of two types: The first does not prevent contemplation and thus does not invalidate the prayer. The second prevents understanding and presence of heart, thereby preventing reward, but it does not invalidate the prayer; rather, it absolves one of responsibility. Therefore, the worshiper must strive to repel these obsessive thoughts and be mindful of standing before God.