The bhakta who kept thinking of the Lord always might want to do pooja to him. He cleans the lotus feet of the lord with pure water specially brought for that purpose and offers flowers that he himself specially picked. With this attitude that the lord's feet are the most venerable as he does pooja day by day the ego starts waning. The “I” and “mine” are lost more and more. Only His memories linger. He is ready to offer himself fully – his body, mind and intellect - to Him. This is called arcanam.
If one has come thus far one develops the attitude that he needs to do nothing except fall at His feet and remain there! This is vandanam. This reinforces the feeling that we are so small in front of His might. The ego almost totally disappears.
When kamsa came to know where Krishna and Balarama were, he wanted to bring them to his place and destroy them. So he sent akruura for that purpose. Akruura was nandan's relative. So when akruura asked Krishna to accompany him Krishna readily agreed. Of course he would as so many jobs awaited his attention and he had to finish one of the main jobs for which he came to this world.
On their way to kamsa's place they entered the River Yamuna to bathe and perform the evening rituals. Leaving Krishna and Balarama in the banks akruura entered the river. He was astounded to find them there already! He turned to the banks and saw them doing japa. He looked back to the river and still saw them there. After this unique experience wherever he looked akruura saw the two. He realised that they were no ordinary beings. They were divine. With this realisation he started seeing krishna everywhere. He started falling at his feet and do vandana. Doing thus his mind got set on the form of the Lord.