The way to secure peace is to be prepared for war.

They that are on their guard and appear ready to receive their adversaries, are in much less danger of being attacked than the supine, secure and negligent

There never was a good war nor a bad peace.

In times of peace, the war party insists on making preparation for war. As soon as prepared for, it insists on making war.

I hope... that mankind will at length, as they call themselves reasonable creatures, have reason and sense enough to settle their differences without cutting throats; for in my opinion there never was a good war, or a bad peace.

To secure peace is to prepare for war.