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).
The Christian life usually contains some very difficult decisions. Life's choices do not always involve choosing between good and evil; sometimes our choices involve choosing between something good and something better or best. For instance, a choice may involve something not necessarily wicked, but equally not edifying. This choice may not involve sin, but also fails to build others in the Lord. Believers who truly love the Lord may, at times, have to choose to forsake some things in life because they do not edify. Our passage confirms these truths as it says that all things do not edify. Paul emphasized this when he stated, “if meat make my brother to offend, I will eat no flesh while the world standeth” (1 Corinthians 8:13). Clearly, edification serves a much greater purpose than simple convenience or liberty.