The phrase "an essential principle of" is correct and usable in written English.
It can be used when discussing fundamental concepts or beliefs that are crucial to a particular field, theory, or practice.
Example: "Transparency is an essential principle of effective governance."
Alternatives: "a fundamental tenet of" or "a core value of".
Division into parts serves as an essential principle of growth in his imagination.
It is an essential principle of our system that a person should not be punished unless they have been convicted of an offence.
"What coood be better than a baby?" That rhetorical question sums up an essential principle of Mundy's book: that "having children and loving children is an unstoppable urge; that humans, or many humans, have an overpowering need to have — to be — a family".
Mr Abadi says an essential principle of the Islamic Republic of Iran is to always stand by the oppressed and those suffering injustice.
Hilbert, for example, came to regard AC as an essential principle of mathematics[5] and employed it in his defence of classical mathematical reasoning against the attacks of the intuitionists.
In Denmark, disentangling risk factors that are positively or negatively related to bus accident severity and injury occurrence to bus passengers can contribute to promote safety as an essential principle of sustainable transit and advance the vision "every accident is one too many".
"The existence of Sunday work is a reality," Mr. Ayrault said in a statement, but it added: "Sunday rest is an essential principle in terms of protecting workers and social cohesion".
"In Health Reform, a Cancer Offers an Acid Test," by David Leonhardt (Economic Scene column, front page, July 8), misses an essential principle in the genomic age of prostate cancer research: one cost and treatment cannot benefit every patient.
The principle that human experiments should have some redeeming social value has been an essential principle in human experimentation since the adoption of the Nuremberg Code (1949).
Humanity is properly a form, or more accurately, the essential principle of a substantial form, that is, something existentially incomplete and dependent; the universal-man is this same form considered according to its own mode of being, and therefore as a sort of existentially autonomous and independent entity (ibid., p 102).
It is a place where the essential principle of commerce and capitalism made everything grotesque, but where beauty somehow crept in — "ugly in every particular, and picturesque on the whole," as he put it.
