He was very weak.
He was helpless against the invading foes.
As he looked at himself, he naturally was full of fear.
He was helpless now as he was helpless before.
These same old enemies came again.
What could he do about them?
He was totally helpless.
Nonetheless, he feared God.
Hence he set himself to seek unto Jehovah; and he proclaimed a fast throughout the land.
He had no other recourse but to come before God.