John 5:24

I assure you, most solemnly I tell you, the person whose ears are open to My words-who listens to My message-and believes and trusts in and clings to and relies on Him who sent Me has (possesses now) eternal life.

Their continual sin sears the consciousness of a sinner, and without their eyes opened, they will not see a reason to change. When life changes dramatically, forcing a new perspective, they will remember the seeds planted by a believer. Keep being the witness in action and deed to the lost and unsaved.