Matthew 23:20 Meaning

18And, Whosoever shall swear by the altar, it is nothing; but whosoever sweareth by the gift that is upon it, he is guilty.

19Ye fools and blind: for whether is greater, the gift, or the altar that sanctifieth the gift?

20Whoso therefore shall swear by the altar, sweareth by it, and by all things thereon.

21And whoso shall swear by the temple, sweareth by it, and by him that dwelleth therein.

22And he that shall swear by heaven, sweareth by the throne of God, and by him that sitteth thereon.