Mark 11:26-29

Mark 11:26 (KJB)
But if ye do not forgive, neither will your Father which is in heaven forgive your trespasses.

Forgiveness is not just a matter of speaking words but it must be from a heart of sincerity. Every Christian must realize the immense amount of sins which they have committed against God and the forgiveness they received having them all blotted out. If a Christian sins against us and we refuse to forgive, then we are placing ourselves in our own prison complete with torments because every time we think of a person sinning against us, it will cause hatred to rise and that will lead to loss of testimony and also physical problems. Forgiveness also means that the person is no longer guilty in your eyes and they must never be harassed once they are forgiven, that is, their infraction once forgiven, remains buried. If a Christian does not want God to deal with them as He does with one who is unsaved, then forgiveness will be the order of the day. Not seven times but seventy times seven!

Mark 11:27 (KJB)
And they come again to Jerusalem: and as he was walking in the temple, there come to him the chief priests, and the scribes, and the elders,

Then after Jesus had finished teaching He had gone back into the temple and a delegation from the Sanhedrin had met Him there. In reference to the cleansing of the Temple by tossing out the moneychangers and those who bought and sold, they had approached Him with two questions. I am sure when they saw Jesus approaching the temple they had become a little nervous in anticipating another episode. This may have not been the full Sanhedrin which came to meet Jesus at the temple but no doubt representatives. (Luke 20:1 KJV) And it came to pass, that on one of those days, as he taught the people in the temple, and preached the gospel, the chief priests and the scribes came upon him with the elders,  According to Luke, Jesus was teaching and preaching at the time He was approached.

Mark 11:28 (KJB)
And say unto him, By what authority doest thou these things? and who gave thee this authority to do these things?

The first question was, “By what authority doest thou these things?” This question had challenged the nature of the authority of Jesus such as are you a Scribe? A Prophet? Or do you hold some other office? They wanted to know, based upon what did He do this thing? Then the second question, “and who gave thee this authority to do these things?” They wanted to know who gave Him the authority to come into the temple and to do those things? For the last three years, Jesus had been teaching that His authority had come from God but the Jewish leaders had chosen not to recognize this, as some accused Him of having a devil, and even His miracles had not convinced them. Their minds were closed to truth and would not be opened.

Mark 11:29 (KJB)
And Jesus answered and said unto them, I will also ask of you one question, and answer me, and I will tell you by what authority I do these things.

To answer a question with a question was the typical way of the rabbinical debate method. Many times the counter question would reveal the actual issue behind the first question, as it will here. Jesus will be glad to tell them by what authority He has done these things and who gave Him this authority if they would just answer one question for Him.