Have No Doubt
Doubt can be traced back to biblical times and many of us can be viewed as a "doubting Thomas". But doubt today often comes when things are changed without our having any say in the matter, for instance loss of a job, family disruptions, or even loss of faith.
Doubt is the rise of uncertainty of a belief or opinion that often interferes with a decision-making.
Being doubtful implies a lack of conviction, oftentimes producing mistrust or hesitation.
There is a great deal that we can be doubtful about today with the never-ending stream of problems that we encounter at both the micro and macro level. Having doubt can be healthy because it requires us to question things that truly have importance to us. Without it, life would become very mundane, don't you think?