There is no such thing as forgiven sinning. Either you are sinning and not forgiven, or you are forgiven and not sinning. The blood can only cover abandoned sin. If you willfully think, say, or do anything that is against the known highest good of God or mankind, it is sin. Love is the door to heaven, the key to happiness, and the essence of holiness.
Time is secession, it is the measurement between causes and effects.
Time has meaning only to the created. Matthew uses the kingdom of the heavens to mean the government of the universe. His theme is Jesus the King. By using the government of the universe, Matthew is emphasizing the greatness of the King, that He is indeed the King of kings. Christ will strengthen you in your doing, not in your not doing.