We have already pointed out that the expression in the text may either be taken as referring to the subjective quality of truthfulness, or to the objective truth of God as contained in the Gospel, but these two interpretations may be united, for the main factor in producing the former is the faithful use of the latter and an honest submission to its operation. The Psalmist of old had learned that the great safeguard against sin was the resolve, Thy word have I hid in my heart.' That word brings to bear the mightiest motives that can sway life. It moves by love, by fear, by hope: it proposes the loftiest aim, even to imitate God as dear children; it gives clear directions, and draws straight and plain the pilgrim's path; it holds out the largest promises, and in a measure fulfils them, even in the narrowest and most troubled lives. If we have made God's truth our own, and are faithfully applying it to the details of daily life and submitting our whole selves to its operation, we shall be truthful and shall instinctively shrink from all unreality. If we know the truth as it is in Jesus, and walk in it, that truth will make us free,' and if thus we are in Him that is true, even in His Son, Jesus Christ,' that truth abiding in us, and with us, for ever, will make us truthful. In a heart so occupied and filled there is no room for the make-believes which are but too apt to creep into religious experience. Such a soul will recoil with an instinct of abhorrence from all that savours of ostentation, and will feel that its truest treasure cannot be shown. It is our duty not to hide God's righteousness within our hearts, but it is equally our duty to hide His word there. We have to seek to make manifest the savour of His knowledge in every place,' but we have also to remember that in our hearts there is a secret place, and that not easily forgiven are they who draw back the curtains,' and let a careless world look in. It is not for others to pry into the hidden mysteries of the fellowship of a soul with the indwelling Christ, however it may be the Christian duty to show to all and sundry the blessed and transforming effects of that fellowship.
But God's truth must be received and its power submitted to, if it is to implant in us the supreme grace of perfect truthfulness. Our minds and hearts must be saturated with it by many an hour of solitary reflection, by meditation which will diffuse its aroma like a fragrant perfume through our characters, and by the habit of bringing all circumstances, moods, and desires to be tested by its infallible criterion, and by the unreluctant acceptance of its guidance at every moment of our lives. There are many of us who, in a real though terribly imperfect sense, hold the truth, but who know nothing, or next to nothing, of its power to make us truthful. If it is to be of any use to us, we must make it ours in a far deeper sense than it is ours now; for many of us the girdle has been but carelessly fastened and has worked loose, and because, by our own faults, we have not abode in the truth,' it has come to pass that there is no truth in us.' We have set before us in the text the one condition on which all Christian progress depends, and if by any slackness we loosen the girdle of truthfulness, and admit into our religious life any taint of unreality, if our prayers say just a little more than is quite true, and our penitence a little less, we shall speedily find that hypocrisy and trivial insincerity are separated by very narrow limits. God's truth in the Gospel cleanses the inner man, but not without his own effort, and, therefore, we are commanded to cleanse ourselves from all filthiness of flesh and spirit, perfecting holiness, in the fear of the Lord.'