Editing Mesechtas Terumot (section)

==== Instruction in Divine Service ====
From this, the Rebbe teaches an instruction regarding the great value of a person's knowledge and thought, both in the negative side - how careful one must be about negative thoughts, because in addition to the severity of the matter itself, it also harms the world around him - and in the greatness and necessity of positive thought, to think about the welfare of others, because in addition to helping through actual deed or speech, thought also helps greatly.