In his book Light for Anxious Souls, George Cutting told about a farmer who lacked the assurance of salvation. He foolishly prayed that as an evidence of his acceptance, the Lord would cause 10 sheep of his flock -- and only 10 -- to gather in a certain shed out in the pasture.
Later that day, when the farmer anxiously approached the shed, he was relieved to find exactly 10 sheep. That gave him a temporary sense of peace. Doubt returned with the shocking thought that it may have been just a coincidence. So he asked the Lord that 10 different sheep might gather in an opposite corner of the pasture. And they did!
When the farmer was asked, “Did this give you assurance?” he said, “No, nothing gave me certainty until I got the sure Word of God for it.”
Cutting concluded, “He was all in a fog of uncertainty until he planted his foot firmly on the Thus saith the Lord.“