If there is no resurrection of the dead, then not even Christ has been raised. And if Christ has not been raised, our preaching is useless and so is your faith. (1 Corinthians 15:13-14 TNIV)
The foundation of our faith is the resurrection of Jesus. This is what the first Christians dies for. They served God with this as their motivation. “The faith that the Lord has once for all entrusted to us, his people,” hinges on whether or not Jesus rose from the dead.
This is not to say that things like the divinity of Jesus, the trinitarian nature of God, the inerrancy of Scripture, or the virgin birth are unimportant. I would actually say that the resurrection, on all but maybe one of those points, proves them to be true. The one that it doesn’t prove is the inerrancy of the Scripture. But, rather, it validates the Scriptures for they prophesied or stated, directly or indirectly, all of these things.
The resurrection did more than just secure our victory over death. It gives us hope. It proves that God truly is with us, in all things, whether “trouble or hardship or persecution or famine or nakedness or danger or sword,” even death.
Truly, “if God is for us, who can be against us.”