If you have reason to believe their hearts have been renewed, show them the importance of high spiritual attainments. Urge upon them the duties of watchfulness, self-examination, studying the Scriptures, and prayer. Show them also the necessity of carrying out their religion into every action of their lives. Show them that the design of religion is to make them better; to give them better dispositions; to keep them humble; and make them more amiable, obedient, and dutiful in everything. Teach them also the great importance of improving their minds, while young, to fit them for the service of Christ. You may have before you some future Harriet Newell, or Mrs. Judson, who may willingly surrender all the comforts of this life to carry the glad tidings of salvation to the benighted heathen. 5. _Be earnest and importunate for the Holy Spirit to bless your labors._ Without this, all your efforts will be in vain. Feel continually that you are but an instrument in the hand of God; and that all your success must depend upon him. Yet he _has promised_ to give his Holy Spirit to them that ask him. Let no day pass without presenting before the throne of grace every individual of your class: endeavor to remember as particularly as possible the peculiar circumstances and feelings of each. Visit them as often as you can; and, if possible, persuade them to meet with you once a week for prayer. But make no effort in your own strength. Search well your motives, and see that self-seeking has no place in your heart. If you seek the conversion of your class, that you may be honored as the instrument, you will be disappointed. _God must be glorified in all things._ II. There are also duties that we owe to God, _in private_, which ought to occupy a portion of the holy Sabbath. In the present age, when so much of the Lord's day is spent in attendance upon public worship and the Sabbath school, there is danger that secret communion with God will be neglected; and thus, like the tree with a worm at its root, the soul will wither under the genial rain and sunshine of the gospel. With a few practical directions on this point, I shall close this letter. 1. _Spend as large a portion as possible of the intervals of public duties in your closet._ The time thus spent should be employed principally in the devotional reading of the Holy Scriptures; meditation, for the purpose of getting your own heart affected with divine truth; self-examination, and prayer. If you have very much time to spend in this way, you may employ a part of it in reading some devotional book; but I think our reading on the Sabbath should be principally confined to the Scriptures. But _prayer_ should be frequent, and mingled with everything.