A.W. Tozer emphasizes the necessity of serious thought combined with the illumination of the Holy Spirit in understanding truth. He critiques both extremes of intellectualism and anti-intellectualism within evangelical circles, asserting that both are misguided. Tozer argues that while human intellect has limitations, it is essential for grasping divine revelation, which is often given to those of superior intellect. However, he warns that thinking without the Holy Spirit's guidance can lead to confusion and error, as the fallen intellect cannot navigate truth alone. Ultimately, he calls for a reliance on the Holy Spirit to enlighten our understanding and guide our thoughts.