Dependent upon karma-resultant vedanā (feeling) arises trsnā / tanhā, hunger and thirst, or craving for excitement; the fever of unsatisfying longing.  It is the flame of desire that burns unsatisfied from birth to birth until once and for all extinguished in the cool waters of Nirvāna… The interval between these two nidānas is the battlefield of the spiritual life and to experience feelings yet check

If we learn to pass from a knowledge of the conditioned nature of particular groups of phenomena to an understanding of conditionedness as a universal law, and from an understanding of this law to a realization of the supra-logical Truth which it represents, then we shall see the texts dealing with the doctrine of Conditioned Co-production not as a tangle of ‘contradictions’ but as the complementary