There is safety in numbers
Possible interpretation: You are safer as part of a group of people than as an individual. Being in a group makes people more confident about taking action.Note: safety (noun) = security; a situation free from danger | numbers (noun) = a large quantity (of people)
Origin: Possibly an allusion to the Bible (Proverbs 11:14): "In the multitude of counsellors there is safety."
If you think that "there is safety in numbers", you will feel more secure