John Calvin writes that Christ does not elect us and redeem us that we may sin freely. Instead, Christians are “raised up by his grace, [that] they may also take his yoke upon them, and that, being free in spirit, they may restrain the licentiousness of their flesh.” We put on the light and easy yoke of Jesus’ commandments when we trust Him, and we move from being slaves to sin to being slaves of Christ. You are His if you trust Jesus and endeavor to serve Him.
For further study:
The Bible in a year: