'It is these half-conscious fears, this dread of insecurity, rather than any deliberate refusal to face the cost of following Christ, which make us hold back. We feel that the risks of out-and-out discipleship are too great for us to take. In other words we are not persuaded of the adequacy of God to provide for the needs of all those who launch out whole-heartedly on to the deep sea of unconventional living in obedience to the call of Christ. Therefore, we feel obliged to break the first commandment just a little, by withdrawing a certain amount of our time and energy from serving God in order to serve mammon. This, at bottom, seems to be what is wrong with us. We are afraid to go all the way in accepting the authority of God, because of our secret uncertainty as to his adequacy to look after us if we do.
Now let us call a spade a spade. The name of the game we are playing is unbelief...'
JI Packer, Knowing God, p.307.