I am not quite sure what the answer to your question would be in an arranged marriage situation (because I presume that is the point of view from which you are asking) but for me, within the first few minutes of meeting hubby, I knew he was the one (not arranged). There was no cold feet, no second thoughts, absolutely nothing but certainty Allhamdullilah. If you are not 100% sure, do not proceed until you are comfortable.