Doubt is also important in life

Doubt is also important in life, but only as much as salt in food. When it becomes too much, then it is a disease, it is called paranoia. When it just the right amount, a person stays alert and aware and does not get into the wrong company. So, just like salt in food, you cannot do away with it completely. But when it is more than required, then pranayamas and meditation help.

~ Gurudev Sri Sri Ravi Shankar