It would have been much simpler had the Pharisees believed the blind man s testimony of how he was healed. It would have been even better had they believed the Healer. If you will imagine a bicycle with its spokes radiating out from its central hub, letting the hub represent unbelief, you could then picture the enormous effects of unbelief. The unbelief is the root of the problem or the cause, with the spokes representing each condition or the effect resulting from that unbelief. This illustrates the enormous effect that unbelief has on others.
Stability comes from trust or believing.
When there is trust in marriage, there will more likely be peace and stability. The frustration of not being able to explain how the prior blind man could be healed apart from Jesus caused a division as well as a disturbance. Though verses 13 through 15 do not indicate the Pharisees being disturbed, the context does imply this as the events continue to unfold. Their disturbance was further revealed in their being divided. Their division came when they were confronted by those who seemingly were exercising at least a measure of belief.