'May' in the Bible

For although a person may toil with great wisdom and skill, he must leave his reward to someone who has not toiled for it. This also [is] vanity and a great calamity.

For if one falls, his companion may help him up. But pity the one who falls and there is {no one} to help him up.

{Although an assailant may overpower one person, two may withstand him}. A threefold cord {is not easily broken}!

Then I saw all the work of God--man [is] not able to discover the work that is done under the sun. Although man may toil in seeking, he cannot find it. Even if a wise man claims [that he] knows it, he cannot find it.

Do not curse the king even in your thoughts, and do not curse the rich even in your own bedroom, for a bird of the sky may carry your voice; a winged messenger may repeat your words.