Why are words so important? They reveal the truth of the heart. If one speaks impulsively, it reveals the iniquity in their heart, proving their outward religiosity as false. True religion has nothing to do with looking holy, and everything to do with serving others and conforming to God's pure standards instead of the world's foul (though often good/expedient-looking) ones. In serving the marginalized with a pure heart (ie. with humility, recognizing that service doesn't gain standing before God), no return is expected. It is a true representation of Christ's unconditional love, and is thus pure.
Main point summary
God's view of a pure practice is based on serving the needy and resisting the evil world culture, and is evidenced in circumspect speech.
If anyone thinks he is religious
If anyone considers themself religious and godly
q and does not bridle his tongue
And does not control their speech
but deceives his heart,
Then they are fooling themselves
this person’s r religion is worthless.
And their "religion" is worthless.
Religion that is pure and undefiled before God, the Father, is this:
Here's what God considers pure, undefiled religion:
s to visit t orphans and widows in their affliction,
Visiting the marginalized and afflicted
and u to keep oneself v unstained from the world.
And staying pure amidst the world's evil tug.
James 1:26-27 ESV
26 If anyone thinks he is religious q and does not bridle his tongue but deceives his heart, this person’s r religion is worthless. 27 Religion that is pure and undefiled before God, the Father, is this: s to visit t orphans and widows in their affliction, and u to keep oneself v unstained from the world.