It is understandable that in our human weakness, we tend to be dissatisfied about some things and some people.
So we get irritated and annoyed and we slide into complaining and criticising.
But when we complain and criticise, then we won't be able to understand and sympathise.
In the 1st reading, the members of the Sanhedrin didn't want to understand what the disciples were saying nor did they want to know why they were proclaiming that message.
But the wise Gamaliel gave the Sanhedrin some good advice about the difference in the ways of God and the ways of man.
He wanted to understand and he wanted the members of the Sanhedrin to understand so that they won't end up fighting against God.
In the gospel, Jesus showed how important it is to understand and to sympathise with people.
He attended to their needs and He fed them, and taught His disciples with His actions.
Let us remember that when we complain and criticise, we won't be able to understand and sympathise with people.
But when we want to understand and sympathise, then we will also realise that there is nothing to complain or criticise about.