1 Corinthians 14:25 KJV
 And thus are the secrets of his heart made manifest; and so falling down on his face he will worship God, and report that God is in you of a truth.
There can be no assent to prayers that are not understood. A truly Christian minister will seek much more to do spiritual good to men's souls, than to get the greatest applause to himself. This is proving himself the servant of Christ. Children are apt to be struck with novelty; but do not act like them.
Christians should be like children, void of guile and malice; yet they should not be unskilful as to the word of righteousness, but only as to the arts of mischief. It is a proof that a people are forsaken of God, when he gives them up to the rule of those who teach them to worship in another language. They can never be benefitted by such teaching.
Yet thus the preachers did who delivered their instructions in an unknown tongue. Would it not make Christianity ridiculous to a heathen, to hear the ministers pray or preach in a language which neither he nor the assembly understood? But if those who minister, plainly interpret Scripture, or preach the great truths and rules of the gospel, a heathen or unlearned person might become a convert to Christianity.
His conscience might be touched, the secrets of his heart might be revealed to him, and so he might be brought to confess his guilt, and to own that God was present in the assembly. Scripture truth, plainly and duly taught, has a wonderful power to awaken the conscience and touch the heart.
- Matthew Henry's Concise Commentary (Public Domain)
Holy Spirit, Truth divine, dawn upon this soul of mine. Voice of God, and inward Light, wake my spirit, clear my sight.
Holy Spirit, Love divine, glow within this heart of mine. Kindle ev’ry high desire, purify me with your fire.
Holy Spirit, Pow’r divine, fill and nerve this will of mine. Boldly may I always live, bravely serve and gladly give.
Holy Spirit, Law divine, reign within this soul of mine. Be my law and I shall be firmly bound, forever free.
Holy Spirit, Peace divine, still this restless heart of mine. Speak to calm this tossing sea, grant me your tranquility.
Holy Spirit, Joy divine, gladden now this heart of mine. In the desert ways I sing, spring, O living Water, spring!
Holy Spirit, Truth Divine Author: Samuel Longfellow (1864)