Practicing NEW thoughts vs. new thoughts that comes through effortlessly

In my experience there are (new) thoughts I want to believe on purpose that require a lot of work– commitment, thought work, etc.

On the other hand, there are times when a new belief just comes through me, without any effort and instantly CLCKS. For example, years ago when I was working a corporate job, one day I woke up and thought: I am meant to do something far greater. That thought immediately shifted everything– caused a new feeling, drove a new action. Earlier this year, a (new) thought about my business came through me (without any effort), it immediately stuck and changed my trajectory.

What is your perspective on this? Why does this happen? How can we experience the latter more often?