Romans 3:4 says, “let God be true, but every man a liar.” Perhaps this truth serves as the foundational reason why God warned believers not to place their trust in man. Though the primary reason, it is not the only reason. In Psalm 146:3 the Lord warns, “Put not your trust in princes, nor in the son of man, in whom there is no help.” The real needs of mankind cannot be satisfied by man, even the best of men. Those who put their trust in man do so in disobedience to the Lord which results in their own personal harm. Psalm 118:8-9 twice stresses that “It is better to trust in the LORD.” An improper trust in man is, in many ways, a departure from the Lord (Jeremiah 17:5).
It is easy to tell others what to do and how to do it, but very unwise to fail to follow one’s own instructions and teachings. In fact, man naturally seems to want to place greater burdens upon others than he himself is willing to bear. This was one of the primary issues addressed by those attending the council of Acts chapter 15 in Jerusalem. Peter concluded with the other apostles in agreement that it was not right to ask others to bear a yoke that previous generations were unable to bear (Acts 15:10). This does not mean that believers change their teaching to fit their obedience. Rather, believers ought to obey the truth and teach these truths to others. How many preachers and teachers have spoken about subject matters only to refuse to obey the very truths they have taught to others?