The Gift of the Holy Spirit

The gift of the Holy Spirit must be accompanied by our free choice to follow His inspiration and guidance. If we do not choose to resist sin, the Spirit cannot help us, for He will not violate our freedom. However, if we make even a weak resolve to struggle against temptation and sin, the Holy Spirit can rush into us and fortify that weak resolve, giving us enough strength to resist the deadly sins with greater effectiveness.
— Fr. Robert Spitzer, S.J.
from his book Escape from Evil’s Darkness