Galatians 5:16 NIV
So I say, walk by the Spirit, and you will not gratify the desires of the flesh.
Our flesh fights with the Spirit and we are not to do as our flesh desires but what the Spirit desires. The Spirit of God calls us to love, joy and peace. When we make ourselves focus on the fruit of the Spirit then we will start walking by the Spirit.
Galatians 5:22-23 NIV
But the fruit of the Spirit is love, joy, peace, forbearance, kindness, goodness, faithfulness, gentleness and self-control. Against such things there is no law.

