Aside from God’s Word, there is nothing we can rely upon. We cannot trust our heart, for it always wants to follow the erring path. Scripture says that whoever relies on his heart is a fool. Our own understanding is equally fallible…. We cannot depend on the testimony of people for their judgments can be both errant and deceptive, sometimes by mistake and sometimes wantonly. All people are liars, the Bible teaches, and experience confirms this.—C. F. W. Walther, God Grant It!, p. 488.