Bhagavad Gita, Chapter 7, Verse 19

At the end of many births, the man of wisdom takes refuge in Me, realising that all this is Vâsudeva. Very rare is that great soul.

This kind of real surrender isn't described as a quick realization, it's the result of a long, real process.

This is honest about the actual timeline. Genuine, complete surrender is described as something that tends to build gradually, over real accumulated effort, not something that typically arrives suddenly or easily.