“Sometimes, we may feel as though we cannot trust anyone except ourselves. However, we cannot even trust ourselves as much as we can trust God. After all, our hearts can deceive us. Sometimes, we believe what we want to believe because it is easier to believe a lie than it is to believe a painful truth. We often believe what we think needs to be true, depending on how we feel, and despite what we know to be true. For example, how many of us have ignored the obvious unfaithfulness of a friend, because we could not bear the thought of losing the friendship? In those cases, we ignore the truth to our own detriment; and thus prove that we cannot trust ourselves as much as we can trust God.
Furthermore, we cannot trust ourselves, as much as we can trust God because we are fallible. That we are fallible means that we can make mistakes; that we are subject to error. Sometimes we make mistakes out of blind or willful ignorance. At other times, we make an error in judgment because we, simply, do not know what is best; for, as humans we are limited in our knowledge. We frequently mistake the motives or meanings of the words and actions of other people. And, often, our past situations and relationships obscure our ability to perceive our present realities (our relationships, situations, and circumstances) accurately. This is one reason that the Bible warns us that we cannot even trust our own hearts. God’s word says, “The heart is deceitful above all things, and desperately sick; who can understand it?” (Jeremiah 17:9). Instead of trusting in our own hearts, we should learn to trust God to give us the wisdom that we need for all of the relationships, situations, and circumstances in our lives. We can trust God in all of these things because, unlike us, God is infallible (that is, God is not capable of making mistakes or being wrong).”
Taken from Walking in Newness of Life: Experiencing the power of God in Resurrection by Identifying with Christ in His Death and Burial, pp. 29-30.