In both "Like the Sun" and "The Open
Window", truthfulness is the idea that is explored.
In Like the Sun, Sekhar decides to be truthful and makes a
pact with himself and eternity yet he soon finds out that being truthful isn't
so easy.
On the other hand, “The Open Window” conveys the message
that in a person's narrative about an incident, it is often difficult to
decipher the truth.
The clause <em>when we can rest </em>is a subordinate/dependent clause, meaning that it cannot stand on its own - it has to be a part of a larger, independent clause, as is the case here.
The rhetorical devices that Thoreau used in Resistance to the civil government are:
Metaphor: is used to help the reader to understand the argument he is trying to say. Government as a machine (mechanical, unnatural, dehumanized).
Anaphora: Thoreau uses repetition and parallel structures. For example, repetition of "Why" or "does not".
Allusion: Christ, Copernicus, Luther, Washington and Franklin rebels.