Someone once said to never trust a man who believes in nothing. Another man retorted that we should never trust someone who believes in everything.
A wise man would ask that if the cynic and the fool cannot be trusted, what about the individual who believes in something?
Myself, I feel that I can trust a man who has faith to be who he is, even if I disagree with him. That doesn't mean that I'd trust him with my life, but I can trust a person who has strongly held beliefs to be consistent in his actions.
A cynic who believes nothing is prone to inaction and asking questions, then questioning the answers. A fool is liable to act inconsistently based on whatever beliefs have gripped him on any given day.
I hope you always have that choice.