That is because he uses the wits in that black head of his .<br>In fact , some people are unkind enough to say that he spends all his spare time in planning mischief .<br>The more he thought of those eggs , the more he wanted them , and it was n't long before he began to try to plan some way to get them without risking his own precious skin .

Based on the paragraph above can we conclude that "Mischief cannot be planned."?