Al-Quddus is the Holy and Pure essence. God -great and glorious- is free from any shortcomings, mistakes, etc. and is beyond our understanding of perfection. Our definition and understanding are limited in their very nature and therefore imperfect and inaccurate in an absolute sense.

Everything God -great and glorious- created is holy as it comes from Him. In order for man to inculcate this attribute, he needs to be aware of God's presence in everything and direct his knowledge, will, and actions while maintaining the conciousness of God. His knowledge should be with achieving the goals in the next life while seeing the signature of God in everything of this life. His will should be directed to conduct acts with the appropriate intentions of pleasing God-great and glorious.