He who has the bride is the bridegroom; but the friend of the bridegroom, who stands and hears him, rejoices greatly because of the bridegroom's voice. This, my joy, therefore is made full.

 (ii) But there may be another reason. The rabbis declared that the best time to study the law was at night when a man was undisturbed. Throughout the day Jesus was surrounded by crowds of people all the time. It may well be that Nicodemus came to Jesus by night because he wanted an absolutely private and completely undisturbed time with Jesus. 