Mark 1:29-31 (also Matt.8:14-17; Lu. 4:38-39)

29 And immediately after they came out of the synagogue, they came into the house of Simon and Andrew, with James and John. 30 Now Simon’s mother-in-law was lying sick with a fever; and immediately they spoke to Jesus about her. 31 And He came to her and raised her up, taking her by the hand, and the fever left her, and she waited on them.

After Jesus called Peter and Andrew (and also James and John) to follow Him, they all went to Capernaum into the synagogue where Jesus taught the people. And while He was there, He also cast out a demon. And then they went to the house of Simon and Andrew.

 In this text (and also in Luke 4:38-39), we see that Peter’s mother-in-law was suffering from a high fever. We can only surmise that Peter asked Jesus to come and help her. And when He did help her the fever left her. This interaction no doubt brought a great bonding to Peter and Jesus. Earlier Peter was amazed by the great catch of fish, then by the casting out of a demon, now by the healing of his mother-in-law. I imagine that Peter was thinking, who is this Jesus?