This phrase often implies an emotional toll, suggesting the difficulty wasn't trivial.

Emotional Weight

It's usually metaphorical, meaning the 'it' isn't a physical ordeal but rather a challenging situation.

Not Literal

Often used when talking about relationships, indicating one person significantly strained the other.

Used to describe a tough, often structured training or educational process.

Implies that going through the process is noteworthy or an accomplishment.

The difficult process is intended to prepare the person for future challenges.