'May' in the Bible

But let patience have her perfect work, that ye may be perfect and entire, wanting nothing.

Yea, a man may say, Thou hast faith, and I have works: shew me thy faith without thy works, and I will shew thee my faith by my works.

Behold, we put bits in the horses' mouths, that they may obey us; and we turn about their whole body.

Ye ask, and receive not, because ye ask amiss, that ye may consume it upon your lusts.

Confess your faults one to another, and pray one for another, that ye may be healed. The effectual fervent prayer of a righteous man availeth much.