I do.

Do you reject sin so as to live in the freedom of God's children?
Do you renounce the glamour of evil, and refuse to be mastered by sin?
Do you renounce Satan, the author and prince of sin?
Do you believe in God, the Father Almighty, 
  Creator of heaven and earth?
Do you believe in Jesus Christ, 
  God's only Son, our Lord,
  who was born of the Virgin Mary, 
  was crucified, died, and was buried,
  who rose from the dead,
  and is now seated at the right hand of the Father?
Do you believe in the Holy Spirit,
  the holy catholic Church,
  the communion of saints,
  the forgiveness of sins,
  the resurrection of the body,
  and life everlasting?

Like the bride who answers before the groom, the church responds

"I do."

It's part of the liturgy druing Easter, for the congregation to renew their baptismal promises together. I do.