The net was an essential tool of their trade. The word translated “forsook” means a deliberate departure or separation. This separation was considered, the decision to separate made, and the action taken.
There is comfort in holding on to the tools I've used to make my life, so once this kind of decision is made the action must be swift, or, like Lot's wife, the decision may die in a longing glance back.
What must I forsake to follow Him? I must forsake the tools I've used to make my life my own, and let Him, the Master of His own tools, make it all over again. Follow Jesus.