'He dares not to go'...is wrong! Where did you see this one? 'He dare not go'...is correct! That is the difference between the two.

This is said by a person that describes a man's choice to not go based on fear. Example: Years ago, we told little Faust that there was a snake and a bear that were teaming up to poison and eat anyone that goes in the dark part of the cave. We told him that he must go in and get his backpack, but faust was only 7 at the time. Even though he said he did not believe us, still, he dared not go.