Since God manifests himself in his image, the mature human person, we have to look on the divine fecundity within human choices. Grace and the supreme happiness we receive are gifts of God, but they are not given to dead wooden blocks, but to men and women with a set structure which enable good, responsible action. So we're not quietists merely waiting to be struck by grace, but the grace flows through our actions. Our talents must be invested, not buried. There is a call to responsible, competent, professional, risky action.
Spiritual life entails the gift of self which is absolute.
We give ourselves entirely to God by good action. God created man, with all his faculties, for action. The parable of the two sons shows that it's not good enough to have good intentions. As we grow spiritually, we discover more layers of our pride and sinfulness. God puts both the will and the action into us.