John 12:37-41

"But although He had done so many signs before them, they did not believe in Him..." (John 12:37; NKJV).

They heard him preach.  They saw His the signs, wonders and miracles He performed.  Yet, they did not believe.  They were blinded and hardened by the light He came to give them.

Have a good heart.  See with you eyes.  Understand with your heart and turn to Him.  See His glory.