Karma - The Mechanism: Tattvarthasutra 9.15

Charitramohe nagnyaratistrinisadyakroshayachanasatkarapuraskarah (15)

Defenselessness, ennui, distraction, 'sitting' on the intention to grow, insult, the unwillingness to accept help and vanity because of great learning are manifestations of karma that obstructs right action. (15)