They oppose and defeat the Spirit. They destroy the freedom that Christ gave Christians. Love, joy, peace, patience, kindness, goodness, faithfulness, gentleness, and self-control. The law does not oppose any of these. All a Christian man or woman needs to do to determine if he or she is controlled and guided by sensual desire or by the Spirit is to examine his or her own life.
Crucifixion is a slow death.
It is also a painful death. This is self-inflicted crucifixion. If the Spirit gave us spiritual life, then let us follow the Spirit. Remember the situation that motivated Paul to write this letter and consider Paul's instructions in that context. The things Paul revealed through the teaching of this letter likely created the groups among the congregations in Galatia.