Terraform data sources feel harmless.
They do not create infrastructure.
They do not change state.
They only read what already exists.
And that is exactly why they matter.
In this lesson, we look at common data sources like VPCs, subnets, and AMIs through a single lens: observation versus ownership. We examine where data sources are evaluated, how they attach to the dependency graph, and why Terraform trusts them completely while remembering them not at all.
The result is a subtle risk.
Not because Terraform is unsafe.
But because observation has no memory.
This video is not about how to use data sources.
It is about how Terraform thinks when it reads reality it does not control.
Watch the lesson to build the mental model that prevents silent coupling later.