What are the principles of European foreign policy that Churchill has followed for many years?

At the end of March, 1936, Churchill expounded the principles of European foreign policy he had followed for many years at the Conservative Foreign Affairs Committee. Churchill said: "Britain's foreign policy for 4 years is to oppose the emergence of the most powerful, aggressive and overbearing countries on the mainland, especially to prevent Belgium, the Netherlands and Luxembourg from falling into the hands of these countries. Historically, in these four centuries, people and things, environment and situation have changed, but this goal has always been the same. "