All 7 Uses of

principle
in
Utopia, by Thomas More

They seem, indeed, more inclinable to that opinion that places, if not the whole, yet the chief part, of a man's happiness in pleasure; and, what may seem more strange, they make use of arguments even from religion, notwithstanding its severity and roughness, for the support of that opinion so indulgent to pleasure; for they never dispute concerning happiness without fetching some arguments from the principles of religion as well as from natural reason, since without the former they reckon that all our inquiries after happiness must be but conjectural and defective.†

principles = basic rules or beliefs

These are their religious principles:—That the soul of man is immortal, and that God of His goodness has designed that it should be happy; and that He has, therefore, appointed rewards for good and virtuous actions, and punishments for vice, to be distributed after this life.†

Though these principles of religion are conveyed down among them by tradition, they think that even reason itself determines a man to believe and acknowledge them;†

I have not now the leisure to examine whether they think right or wrong in this matter; nor do I judge it necessary, for I have only undertaken to give you an account of their constitution, but not to defend all their principles.†
*

They differ in this: that one thinks the god whom he worships is this Supreme Being, and another thinks that his idol is that god; but they all agree in one principle, that whoever is this Supreme Being, He is also that great essence to whose glory and majesty all honours are ascribed by the consent of all nations.†

principle = basic rule or belief

since a man of such principles must needs, as oft as he dares do it, despise all their laws and customs: for there is no doubt to be made, that a man who is afraid of nothing but the law, and apprehends nothing after death, will not scruple to break through all the laws of his country, either by fraud or force, when by this means he may satisfy his appetites.†

principles = basic rules or beliefs

They would indeed laugh at any man who, from the principles of reason, would prefer an unmarried state to a married, or a life of labour to an easy life: but they reverence and admire such as do it from the motives of religion.†

Definitions:

(1) (principle)
a basic rule or belief
The exact meaning of principle can depend upon its context. For example:
- "our guiding principles" -- basic moral beliefs that guide decisions and behavior
- "electromagnetic principles" -- rules describing how the world works
- "She lacks principles." -- lacks moral guidelines
- "We agree in principle." -- about important basic beliefs
(2) (meaning too rare to warrant focus)
meaning too rare to warrant focus:

See a comprehensive dictionary for more specialized senses including one in chemistry.