Breakdown of El que uses un método riguroso es indispensable.
ser
to be
un
a, an (masculine)
usar
to use / to wear
que
that / than
Questions & Answers about El que uses un método riguroso es indispensable.
Why do we start the sentence with El que instead of just Que?
Adding El before que groups the whole phrase (uses un método riguroso) into a single, noun-like subject. It essentially means "The fact that...". While starting a subject clause with just Que is technically possible, using El que sounds much more natural and clear in Spanish when the whole clause acts as the subject of the sentence.
Why is the verb usar conjugated in the subjunctive (uses)?
The subjunctive is triggered by the phrase at the end of the sentence: es indispensable (it is indispensable). Even though the sentence focuses on the "fact" that you use the method, impersonal expressions of necessity, opinion, or emotion always require the subjunctive in the dependent clause they refer to.
Could I rewrite this sentence to put es indispensable at the beginning?
How would the sentence change if I wanted to state this as a general rule, rather than specifically saying "you" use it?