Mishnah 1

Rabi said: Which is the correct path that man should choose for himself? That which is a tribute to himself and earns him the respect of his fellow man. Be as meticulous in the performance of a ‘minor’ mitzvah as a ‘major’ mitzvah for you do not know the reward for the respective mitzvos. Evaluate the loss of a mitzvah as opposed to its reward, and the reward of a sin as opposed to its deficit. Consider three things and you will not be taken in by sin: Know what is above you – an Eye that observes, an Ear that listens carefully, and all your deeds are recorded in a book.