～さえ･･･ば、—。 is an expression that is used when just one thing is missing from fulfilling a condition. From that, it can mean “if only ～” or “As long as ～.”
～さえ is often used to mention an extreme example so that people can guess the rest of the situation. Check the usage and more examples.
～さえ has 3 meanings. Today’s post talks about さえ which is used for accumulation. Check the usage with these examples.