It is easier for a camel to pass through the eye of a needle than for one who is rich to enter the kingdom of God. (Mark 10:25)
One school of interpretation has it that the “eye of the needle” to which our Lord refers in this simile is a very low gate in the ancient wall of Jerusalem, the only gate that was kept open at night. An armed guard would stand watch at this gate. He would allow a mounted man through, provided the rider identified himself as a citizen or a friend. To pass through the low gate, however, his camel would have to kneel down and crawl.
Apparently, this nighttime gate may sometimes have been called “the eye of the needle.” Thus, the Lord Jesus’ audience could have thought of a kneeling, crawling camel, humbly bowing low to enter the city, when they heard His simile about the rich entering the kingdom of God.