Titus of Bostra

But he discovered a good device; running before he climbed up into a sycamore, and saw Him whom he had long wished for, i. e. Jesus, passing by. Now Zacchæus desired no more than to see, but He who is able to do more than we ask for, granted to Him far above what he expected; as it follows, And when Jesus came to the place, he looked up, and saw him. He saw the soul of the man striving earnestly to live a holy life, and converts him to godliness.