I didn't recognize him, but he who sent me to baptize in water, he said to me, 'On whomever you will see the Spirit descending, and remaining on him, the same is he who baptizes in the Holy Spirit.'

 So the two disciples of John followed Jesus. It may well be that they were too shy to approach him directly and followed respectfully some distance behind. Then Jesus did something entirely characteristic. He turned and spoke to them. That is to say, he met them half way. He made things easier for them. He opened the door that they might come in. 