First of all he laid great stress upon the _need of conversion._ Until a man is both truly turned unto God and sure of this change in himself he is not fitted to convert others. The ministry is not a human profession, but a divine vocation. The true preacher is both a _herald_ and a _witness,_ and hence must back up his message by his personal testimony from experience.
But even conversion is not enough: there must be an _intimate knowledge of the Lord Jesus._ One must know the Lord as coming near to himself, and know the joy and strength found in hourly access. However it be done, and at any cost, the minister of Christ must reach this close relationship. It is an absolute necessity to peace and power.
_Growth in happiness and love_ was next made very prominent. It is impossible to set limits to the experience of any believer who casts himself wholly on God, surrenders himself wholly to God, and cherishes deep love for His word and holy intimacy with Himself. The first business of every morning should be to secure happiness in God.
He who is to nourish others must carefully _feed his own soul._ Daily reading and study of the Scriptures, with much prayer, especially in the early morning hours, was strenuously urged. Quietness before God should be habitually cultivated, calming the mind and freeing it from preoccupation. Continuous reading of the Word, in course, will throw light upon the general teaching of the Word, and reveal God's thoughts in their variety and connection, and go far to correct erroneous views.
_Holiness_ must be the supreme aim: prompt obedience to all known truth, a single eye in serving God, and zeal for His glory. Many a life has been more or less a failure because habits of heart well pleasing to God have been neglected. Nothing is more the crowning grace than the unconscious grace of _humility._ All praise of man robs God of His own honour. Let us therefore be humble and turn all eyes unto God.
The _message_ must be gotten from God, if it is to be with power. "Ask God for it," said Mr. Muller, "and be not satisfied until the heart is at rest. When the text is obtained ask further guidance in meditating upon it, and keep in constant communion so as to get God's mind in the matter and His help in delivery. Then, after the work is done, pray much for blessing, as well as in advance." He then told some startling facts as to seed sown many years before, but even now yielding fruit in answer to prayer.
He laid also special emphasis upon _expounding the Scripture._ The word of God is the staple of all preaching; Christ and nothing else the centre of all true ministry of the Word. Whoever faithfully and constantly preaches Christ will find God's word not returning to him void. Preach simply. Luther's rule was to speak so that an ignorant maid-servant could understand; if she does, the learned professor certainly will; but it does not hold true that the simple understand all that the wise do.
Mr. Muller seldom addressed his brethren in the ministry without giving more or less counsel as to the conduct of church-life, giving plain witness against such hindrances as unconverted singers and choirs, secular methods of raising money, pew-rents and caste distinctions in the house of prayer, etc.; and urging such helps as inquirers' meetings, pastoral visits, and, above all else, believing prayer. He urged definite praying and importunate praying, and remarked that Satan will not mind how we labour in prayer for a few days, weeks, or even months, if he can at last discourage us so that we cease praying, as though it were of no use.
As to prayers for past seed-sowing, he told the writer of this memoir how in all supplication to God he looked not only forward but _backward._ He was wont to ask that the Lord would be pleased to bless seed long since sown and yet apparently unfruitful; and he said that, in answer to these prayers, he had up to that day evidence of God's loving remembrance of his work of faith and labour of love in years long gone by. He was permitted to know that messages delivered for God, tracts scattered, and other means of service had, after five, ten, twenty, and even sixty years, at last brought forth a harvest. Hence his urgency in advising fellow labourers to pray unceasingly that God would work mightily in the hearts of those who had once been under their care, bringing to their remembrance the truth which had been set before them.