He did not feel guilty about what had happened because he was not guilty. Did Christ obey the 5th commandment in doing what he had done? Yes, because he was obeying his Father in heaven.
God expects us to remember his word. It does not fade or lose its truth content. It should not fade in our minds either. What he says is true forever, and we may take it into our hearts as something that we can depend on. He will not change or unsay it. We may not understand all its implications to begin with, but it is our duty to reflect on it, to turn it over in our minds. God’s word is very deep and though we must do this with great care, there are certain implications of it that we should explore which are indisputable.