The particular problem Jesus had with the Pharisees, at least as it relates to purity, was their hypocrisy. They pretended to be teaching God’s law but they had elevated man’s tradition instead. It’s a good example of “impurity” because by definition to be pure is to be of “one thing” with nothing else in the mix. They had the combo thing going….and to their own advantage.
As to personally being “pure in heart” one thing stands out. You have got to get the directions from the one true source – God. As in the John 15 passage – abiding comes to mind again. The Pharisees had stopped doing that. Instead they shifted their allegiance to someone’s application of God’s law instead of God’s law itself. Having “nailed it down” so to speak, they no longer needed God to speak to them.
“…they are blind guides. And if the blind lead the blind, both will fall into a pit.”
It is amazing to me how true this is today. Whether it is some highly regarded Christian figure or some misapplied teaching so firmly entrenched it is above new scrutiny or your own preferred news outlet, we are in danger of being blind followers of blind guides.
I can’t take on every question that comes down the pike these days but I can “not follow” until my heart is given clear direction.
The only cure for a less than singular heart for God is God’s voice through His Word and applied by His Holy Spirit to my heart.
Pure – free from anything of a different, inferior, or contaminating kind; free from extraneous matter: (dictionary.com)
Heart – 2588 kardia – heart, “the affective center of our being”
“According to the Bible, the heart is the centre not only of spiritual activity, but of all the operations of human life.” (dictionary.com)