I am putting my perspective in this example.

For example, One individual saying to self that from tomorrow i will not going to eat Junk Food. But tomorrow arrives and he is failing to stop his urge and he starts eating Junk Food.

In my opinion here perspectives of both of us fulfilled and by that i mean, At least for few hours that individual tuned his mind to act in some way. But he failed to force it because still he is not feeling his decision because he like to eat Junk Food,until he feel to do it, he cannot act do it for so long.

I don't know how well I've put my perspective, but hope that it's making some sense. Stay blessed brother. 🙂