The struggle with legalism was now over and past, at least in its critical phase. The apostle of the Gentiles had won the battle with Judaism and saved the Church in its first great conflict. But another strife is impending (comp. vi. 10); a most pernicious error has made its appearance within the Church itself. St Paul was not to see more than the commencement of the new movement, which took two generations to gather its full force; but he had a true prophetic insight, and he saw that the strength of the Church in the coming day of trial lay in the depth and reality of her knowledge of the Son of God.
At every crisis in human thought there emerges some prevailing method of truth, or of error, the resultant of current tendencies, which unites the suffrages of a large body of thinkers and claims to embody the spirit of the age. Such a method of error our own age has produced as the outcome of the anti-Christian speculation of modern times, in the doctrines current under the names of Positivism, Secularism, or Agnosticism. While the Gnosticism of the early ages asserted the infinite distance of God from the world and the intrinsic evil of matter, modern Agnosticism removes God still further from us, beyond the reach of thought, and leaves us with material nature as the one positive and accessible reality, as the basis of life and law. Faith and knowledge of the Son of God it banishes as dreams of our childhood. The supernatural, it tells us, is an illusion; and we must resign ourselves to be once more without God in the world and without hope beyond death.
This materialistic philosophy gathers to a head the unbelief of the century. It is the living antagonist of Divine revelation. It supplies the appointed trial of faith for educated men of our generation, and the test of the intellectual vigour and manhood of the Church.
III. In the midst of the changing perils and long delays of her history, the Church is called evermore to press towards the mark of her calling. The conditions on which her progress depends are summed up in verses 15 and 16.
To the craft of false teachers St Paul would have his Churches oppose the weapons only of _truth and love_. "Holding the truth in love," they will "grow up in all things into Christ." Sincere believers, heartily devoted to Christ, will not fall into fatal error. A healthy life instinctively repels disease. They "have an anointing from the Holy One" which is their protection (1 John ii. 20-29). In all that belongs to godliness and a noble manhood, such natures will expand; temptation and the assaults of error stimulate rather than arrest their growth. And with the growth and ripening in her fellowship of such men of God, the whole Church grows.