I have heard a proverb. I don't really live by it, but there are certain situations, when it comes to my mind and stays there for some time. "Harbours are made for ships, but ships are not made for harbours"
From the Oxford Advanced Learner's dictionary:
sail (n): a sheet of canvas or other material against which the wind blows and drives a ship or boat through the water.
sail (v): to travel on water in a ship or boat using sails or engine power.
This sailship was spotted in 2002 when I and a good friend travelled to Mytilene, and we sailed on an engine propelled passenger carrier.