In John 21, Peter and six other disciples go fishing.
I have heard a few mention that Peter’s intention was to quit and return to his old way of life. I’m not necessarily sure I believe this. Everything about Peter actually says otherwise. He followed Jesus most closely during His ministry and even during His trials. He was heartbroken after his denial of the Lord. He went to the tomb to see if Jesus had resurrected. In the end of his life, he was crucified upside down.
This is not the track record of a quitter. Rather, it is the track record of a man filled with passion for His Lord.
So what’s up with the fishing? He went fishing for the same reason that any of us does, to clear his head. Sometimes you’ve just gotta get away from everything and destress. He actually learned this from Jesus. The Lord often went up into the mountain alone. He prayed and cleared His head.
Two take aways: one, give people space when they need it and two, take some time when you need it.
Joel Stiff's Adventure 