The miner goes deep into the earth exploring caves and passage ways, and opening up shafts of his own. He reaches places where no man has been before and where darkness has reigned since the earth was formed; he goes into the most inaccessible places known to man.
All of this endeavour cries out for a comparison with the what the Christian knows to be far more precious and genuinely worth exchanging comfort, safety, health, peace and even life for. Of course this exchange brings no real loss to the seeker after heavenly wisdom, for God will more than compensate for any hardship we incur. So the believer is willing to be last, to be the object of scorn, to have goods and honour taken away, and to be faithful unto death, in the interests of obtaining priceless wisdom. This wisdom is more precious than gold, which cannot redeem the soul, nor give God a ransom for it. This wisdom delivers from the grave and from hell; it transforms a person into the image of God in Christ; it gives victory over Satan and all the power of darkness; it saves the soul at the expense of the body and then receives the body back again at the resurrection, vastly improved.