en_tn_lite_do_not_use/heb/12/15.md

no one lacks God's grace

"no one receives God's grace and then lets go of it" or "no one rejects God's grace after first trusting in him"

that no root of bitterness grows up to cause trouble, so that many do not become polluted by it

Hateful or resentful attitudes are spoken of as if they were a plant bitter to the taste. Alternate translation: "that no one becomes like a bitter root, which when it grows causes trouble and harms many people" (See: rc://en/ta/man/translate/figs-metaphor)