'Masters' in the Bible

No man can serve two masters: for either he will hate the one, and love the other; or else he will hold to the one, and despise the other. Ye cannot serve God and mammon.

Again, how can any one enter the house of a strong man and carry off his goods, unless first of all he masters and secures the strong man: then he will ransack his house.

And she said, Truth, Lord: yet the dogs eat of the crumbs which fall from their masters' table.

Neither be ye called masters: for one is your Master, even Christ.