"To revolt is a natural tendency of life. Even a worm turns against the foot that crushes it. In general, the vitality and relative dignity of an animal can be measured by the intensity of its instinct to revolt"

In this quote, Mikhail Bakunin is expressing the concept that rebellion and resistance are inherent qualities of life. He compares this propensity to the reaction of a worm when it is being crushed underfoot - even the smallest and relatively unimportant animal will fight back against injustice. Bakunin goes on to suggest that the strength and worth of an animal can be determined by the strength of its desire to rebel against its oppressors. This can be applied to humans too, as our impulse to revolt versus injustice and oppression is a sign of our vitality and self-respect as people. In general, Bakunin is highlighting the natural and powerful force of disobedience in all living beings.