According to Matthew Henry: “those sins must be conscientiously abstained from, which the eye of God only is a witness to, who searches the heart.” We can easily think we are being obedient if we do many good deeds, however, doing such things while harboring hatred, jealousy, and other such inward sins is to act as a hypocrite. We are hypocrites if we fail to mortify those things only God can see. What inner thoughts and feelings must you put to death?
For further study:
The Bible in a year: