The Pharisees and their scribes were diligent to tithe (give ten percent of) off of the increase of even the small plants in their gardens. These would also have been of the smallest of plots as these plants were seasonings and not food crops. But Jesus said that they should have been paying attention to “tithing” in the “weightier” areas of justice, mercy, and faithfulness. They were seeming to be so pure as to strain out a gnat, but were in fact swallowing camels.
The examples that follow are much the same; they may appear to be good and clean, but inwardly they are vile, evil and filthy.
We choose what we are and how we act. We need to look to Christ and follow His example faithfully. This will entail much prayer for help, it also entails constant obedience; but it avails much satisfaction of a life lived right!