Charles Ellicott Commentary Matthew 22:29

"But Jesus answered and said unto them, Ye do err, not knowing the scriptures, nor the power of God." — Matthew 22:29 (ASV)

You are mistaken — It may be noted that this is the one occasion in the Gospel history in which our Lord comes into direct collision with the Sadducees. On the whole, while distinctly condemning and refuting their characteristic error, the tone in which He speaks is less stern than that in which He addresses the Pharisees. They were less characterised by hypocrisy, and that hypocrisy, as the pessima corruptio optimi, was what called down His sternest reproof.

The causes of their error, He told them, were twofold:

1. An imperfect knowledge even of the Scriptures which they recognized.
2. Imperfect conceptions of the divine attributes, and therefore an à priori limitation of the divine power.

As a result, they could not conceive of any human fellowship in the life of the resurrection except one that reproduced the relations and conditions of this earthly life.