@kriskris
« A person makes a decision without really knowing why, and only later does it prove to have been decisive, its consequences irreversible. That is why we can never know in advance what should be done and what should not. A person is caught in the trap of his own decision, and the more he tries to escape, the more firmly he is held. A decision is a trap from which there is no escape »
Milan Kundera «unbearable lightness of being»
Although I prefer this version, which is closer to the original and doesn't carry such a sense of inevitability:
« Sometimes you make up your mind about something without knowing why, and your decision persists by the power of inertia. Every year it becomes harder to change it »