Baptism isn't an act that gets us into heaven – it is faith in Jesus Christ as Savior and Lord that offers that assurance. Baptism (by full immersion as taught in the Bible) is an act of obedience that should be an immediate part of our acceptance of the gift of grace offered by Jesus Christ.
In dedicating your child, parents acknowledge the child as a gift from God and vow before Him and the congregation to set a godly example for the child and a commitment to lead the child to Christ at an early age.
In joining Lifepointe you make visible your commitment to Christ and his people. Membership is one way to raise the flag of faith. You state before God and others that you are part of this local body of believers.