cost fully; a disinterested desire for the service and not for the honors and rewards that attend it in this world ; an earnest desire, and not a mere feeble, indefi- nite liking ; an abiding desire, and not a desire that will pass away like the morning dew. Such a desire exists in no heart in which it has not been wrought by the Holy Spirit. It is not of man, but of God. When H young man finds such a desire rising in his heart, remaining and strengthening, he has, I think, evidence that God is calling him to this service. 2. But when the .Lord calls he also qualifies, and hence I believe that fitness for the ministry is a second element in a call. Paul, in his first Epistle to Timothy. 3: 2-7, gives the necessary qualifica- tions at length. Until a man finds himself to be in some good degree in possession of these attainments, his call is not complete. He is not yet authorized to apply for admission to the ministerial office. The church is not yet warranted in recognizing him as called of God, and in ordaining him by the laying on the hands of the presbytery. 220 A Busy Ufe. The call is in progress, but not complete. And here I desire you to give special attention to " apt- ness to teach." This, I think, implies two things ( 1. ) Native talent, natural ability ; such as with due