Titus 2:14

We are waiting for his appearing, which is his second appearing, but now Paul talks about what Jesus has already done. When he came down to earth, he redeemed us from all sin by giving himself up for us. He died on the cross for our sins, paying the price we couldn't pay and received in our place the wrath of God that was due to us. Part of what he did by giving himself up for us was also to purify us. This sounds similar to what is said in Ephesians about Christ and the church. Jesus wishes to present for himself a pure and spotless bride. What is also mentioned here is that they are zealous for good works. Not only do they do good works, but they really are passionate about it. I guess these are all part of what it means for Jesus to give himself up for you. He redeems, purifies, and you end up being zealous for good works.