The proverb means that it is better to anticipate and prepare for potential risks than it is to react to them after they have occurred. By taking preventive measures, it is possible to significantly reduce the chances of being affected by potential risks and minimize their impact when they do occur. The proverb serves as a reminder to be proactive and take preventive measures against potential risks.
The proverb is commonly attributed to the English writer and poet John Ray, who wrote in his 1670 book “The Wisdom of God Manifested in the Works of Creation”: “A danger foreseen is half avoided.”