Matthew 13:3-9 “And he spake many things unto them in parables, saying, Behold, a sower went forth to sow; And when he sowed, some seeds fell by the way side, and the fowls came and devoured them up: Some fell upon stony places, where they had not much earth: and forthwith they sprung up, because they had no deepness of earth: And when the sun was up, they were scorched; and because they had no root, they withered away. And some fell among thorns; and the thorns sprung up, and choked them: But other fell into good ground, and brought forth fruit, some an hundredfold, some sixtyfold, some thirtyfold. Who hath ears to hear, let him hear.”
Most of the time, the Word of God does not fall on hearts that will respond to God in a good way. In order to avoid discouragement, we must not have the expectation that the Word we preach will always fall on receptive ears. However, some of the seed will result in fruit, so we need to just keep on giving out the Word and leave the results with the Lord.