To follow Hashem's ways, for He is Holy. By the end of the second day or it was to be destroyed. The corner of the field and the gleanings of the field for the poor and the stranger.
Various answers are acceptable.
One answer could be that we may not take advantage of one who is less knowledgeable that we. Hashem commands us to advise with our neighbor if he is not following Hashem's commandments, to let him know the potential consequences of his ways. We must do this in a kind and loving manner. Describe the process of planting and harvesting fruit trees in the Land. We are forbidden to eat the fruit during the first 4 years.