It is the Lord who draws us to Him by His HolySpirit but that is just a tug. We must respect His wooing by turning to Him and desiring Him.

Sinners can only cleanse their hands by repenting, turning to Christ and receiving His cleansing blood,

Christians can only purify their hearts by deciding to believe the WordOfTheLord exclusively. Otherwise, they are DoubleMinded which yields confusion, fear, unbelief and weakness.