A person must learn to be alone in solitude, to listen in one's heart to the wordless speech of the Spirit, and to discover the truth bout oneself and God. Then their word to others will be a word of power, because it is a word of silence.
Give over thine own willing. Give over thine own running. Give over thine own desiring to know or be anything, and sink down to the seed which God chose in thy heart, and let that grow in thee, and be in thee, and breathe in thee, and act in thee, and thou shalt find by sweet experience that the Lord knows that, and loves and owns that, and will lead it to the inheritance of life, which is God's portion.