Hebrews 11:6
And without faith it is impossible to please Him, for he who comes to God must believe that He is and that He is a rewarder of those who seek Him.

Fairly regularly I hear or read someone saying that we shouldn’t try to please God. That He accepts us as we are, and has forgiven us of everything so just relax. That statement assumes we are trying to please God to be accepted by Him, but I want to please God to bring Him pleasure, to give Him joy, as an expression of love for all He has done for me. The activity that will bring great pleasure to Him is when I seek Him diligently. To want to have an intimate relationship with Him that is real. My seeking God is a result of a strong faith that He exists and that He really does want us to want Him.