Nathaniel Emmonswas a noted New England divine... (wikipedia)
Make no display of your talents or attainments; for every one will clearly see, admire, and acknowledge them, so long as you cover them with the beautiful veil of modesty
Habit is either the best of servants or the worst of masters
Don't despair of a student if he has one clear idea
I could never think well of a man's intellectual or moral character, if he was habitually unfaithful to his appointments.