Would I like to completely quit doubting about anything? I think not. Doubts are a natural mechanism which helps us make the best possible decision in every particular case; without this ability we would most likely make random, uninformed decisions regardless of their possible consequences. But, at the same time, when the decision is made, you must start working to actualize it without hesitation, and this is the moment when doubts become troublesome. The more you think over a certain action of yours, the more likely you will delay the actual realization of what is on your mind.