Thomas à Kempis. (b. 1379 or 1380, d. 1471). The Imitation of Christ.
The Harvard Classics. 1909–14.
Book I: Admonitions Profitable for the Spiritual Life
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2. But alas! it is often to no purpose and in vain. For this outward consolation is no small hindrance to the inner comfort which cometh from God. Therefore must we watch and pray that time pass not idly away. If it be right and desirable for thee to speak, speak things which are to edification. Evil custom and neglect of our real profit tend much to make us heedless of watching over our lips. Nevertheless, devout conversation on spiritual things helpeth not a little to spiritual progress, most of all where those of kindred mind and spirit find their ground of fellowship in God.