The tenderness of the heart of a true Christian, is elegantly signified by our Savior, in his comparing such a one to a little child. . . .
A little child has his heart easily moved, wrought upon and bowed: so is a Christian in spiritual things.
A little child is apt to be affected with sympathy, to weep with them that weep, and can’t well bear to see others in distress: so it is with a Christian (John 11:35, Romans 12:15, I Corinthians 12:26).
A little child is easily won by kindness: so is a Christian.
A little child is easily affected with grief at temporal evils, and has his heart melted, and falls a weeping: thus tender is the heart of a Christian, with regard to the evil of sin.
A little child is easily affrighted at the appearance of outward evils, or anything that threatens its hurt: so is a Christian apt to be alarmed at the appearance of moral evil, and anything that threatens the hurt of the soul.
A little child, when it meets enemies, or fierce beasts, is not apt to trust its own strength, but flies to its parents for refuge: so a saint is not self-confident in engaging spiritual enemies, but flies to Christ.
A little child is apt to be suspicious of evil in places of danger, afraid in the dark, afraid when left alone, or far from home: so is a saint apt to be sensible of his spiritual dangers, jealous of himself, full of fear when he can’t see his way plain before him, afraid to be left alone, and to be at a distance from God; Proverbs 28:14, “Happy is the man that feareth alway; but he that hardeneth his heart shall fall into mischief.”
A little child is apt to be afraid of superiors, and to dread their anger, and tremble at their frowns and threatenings: so is a true saint with respect to God; Psalms 119:120, “My flesh trembleth for fear of thee, and I am afraid of thy judgments.” Isaiah 66:2, “To this man will I look, even to him that is poor, and trembleth at my word.” V. 5, “Hear ye the Word of the Lord, ye that tremble at his word.” Ezra 9:4, “Then were assembled unto me, everyone that trembled at the works of the God of Israel.” Ch. 10:3, “According to the counsel of my Lord, and of those that tremble at the commandment of our God.” A little child approaches superiors with awe: so do the saints approach God with holy awe and reverence. Job 13:11, “Shall not his excellency make you afraid, and his dread fall upon you.” Holy fear is so much the nature of true godliness, that it is called in Scripture by no other name more frequently, than the fear of God.
Religious Affections, WJE, pp. 360-61.