Impossible to Please God Without...

FAITH. Because by faith you receive Him and His actions and His character and His righteousness. It has nothing to do with our own.

Only God is good and only what He does is good. It is only by faith that we can receive Him.

Or presented another way:
God the Father is only pleased by His Son, Jesus Christ. By the Cross (a manifestation of His grace) we've been given His Son. By faith we receive Him and are now IN CHRIST and He is IN US.