'May' in the Bible

This sentence is by the decree of the watchers, and the decision by the word of the holy ones: that the living may know that the Most High ruleth over the kingdom of men, and giveth it to whomsoever he will, and setteth up over it the basest of men.

Therefore, O king, let my counsel be acceptable unto thee, and break off thy sins by righteousness, and thine iniquities by shewing mercy to the poor; if it may be a lengthening of thy tranquillity.

Now, O king, establish the decree, and sign the writing, that it be not changed, according to the law of the Medes and Persians, which may not be revoked.

Then they came near, and spoke before the king concerning the king's decree: Hast thou not signed a decree, that every man that shall ask anything of any god or man within thirty days, except of thee, O king, shall be cast into the den of lions? The king answered and said, The thing is true, according to the law of the Medes and Persians, which may not be revoked.

Then these men came in a body unto the king, and said unto the king, Know, O king, that the law of the Medes and Persians is, That no decree nor statute which the king establisheth may be changed.