“He, therefore, who boasts of having applied to himself by faith the death of Christ, and yet has no desire to live a holy and godly life, that he may so honor the Savior, lies, and gives conclusive evidence that the truth is not in him; for all those who are justified are willing and ready to do those things which are pleasing to God. The desire to obey God can never be separated from an application of the death of Christ, nor can the benefit of regeneration be experienced without that of justification. All those that are justified are also regenerated, and all those that are regenerated are justified.” 
 Zacharias Ursinus, The Commentary of Dr. Zacharias Ursinus on the Heidelberg Catechism, Trans. Rev. G. W. Williard, A. M. Electronic version Ed. Eric D. Bristley, TH.M. (2004), 420.