God's Kingdom is a place where His Good Seed grows.
Perhaps your Mother or your Teacher tells you of Jesus our Saviour, and of His love, and you long to be able to serve Him. You would like to be kind and loving to those round you; you are sorry when you do wrong, you are happy when you do right. That is the Good Seed taking root and growing in your heart!
But at other times you feel differently.
You are not so happy; you do not wish to do good things so much; you even find yourself wanting to do wrong things! You find it hard to be loving; you want so much to do something you have been forbidden to do; you are sure no one will see you if you do wrong, and you say to yourself, "After all, it is such a little thing," or "It is only this once!"
Ah! Those are the tares sown in your heart!
"How did they get there?" the servants asked the Master.
And He answered, "An enemy has done this."
Satan is our enemy. It is true we cannot see him, but he is near us all the same.
Like the enemy in the Parable, he creeps out when men are asleep—when you are off your guard—when you have forgotten to watch and to pray; and it is he who whispers to you that:
"No one will see."