What kind of worship does the Savior call that which is not according to God's commandments?

Answer

"But in vain they do worship Me, teaching for doctrines the commandments of men." Matt. 15: 9.

Did Jesus ever make use of ordinary means in performing His miracles?
What first attracted the prophet's attention?
What was done with the blood of the offering?
What memorial of His creative power did God establish?
Who gives this rest from sin?
What power mentioned in the thirteenth chapter of Revelation is to enforce this mark?
Why was this to be?

Questions & Answers are from the book Bible Readings for the Home Circle