Matthew 13:18 "Hear then the parable of the sower: 19 When anyone hears the word of the kingdom and does not understand it, the evil one comes and snatches away what has been sown in his heart. This is what was sown along the path. 20 As for what was sown on rocky ground, this is the one who hears the word and immediately receives it with joy, 21 yet he has no root in himself, but endures for a while, and when tribulation or persecution arises on account of the word, immediately he falls away. 22 As for what was sown among thorns, this is the one who hears the word, but the cares of the world and the deceitfulness of riches choke the word, and it proves unfruitful. 23 As for what was sown on good soil, this is the one who hears the word and understands it. He indeed bears fruit and yields, in one case a hundredfold, in another sixty, and in another thirty."
What is the good soil of verse 23? It is described in Luke 7:29-30 "(When all the people heard this, and the tax collectors too, they declared God just, having been baptized with the baptism of John, 30 but the Pharisees and the lawyers rejected the purpose of God for themselves, not having been baptized by him.)". The baptism of John was a baptism of repentance. The good soil is people who admit they are sinful, desire to turn away from their sin and take action (See Luke 3:10-14 need help).
Repentant people hear and understand God's word. If we hear and understand God's word we know it is the way to escape the penalty (Revelation 21:8) and power (Romans 7:14-25) of sin. The word of God instructs us to repent and believe the gospel (Mark 1:15; 1 Corinthians 15:3-4; Romans 10:9). When we repent and believe the gospel, we receive the Holy Spirit. When we receive the Holy Spirit, we receive the One who reveals truth to us in an understandable way (1 Corinthians 2:12). We receive the power to obey God's word (Ezekiel 36:27; Ephesians 1:19-20; Ephesians 3:20). When we obey God's word we are blessed and produce fruit (Luke 11:28; John 15:1-5). The fruit produced is described in Galatians 5:22-23; John 15:6-11; Romans 1:13 (saved people), Romans 15:25-26 (help to those in need) and many other places in the scriptures.
In Luke 8:15 Jesus instructs us that we bear fruit holding on to the word of God and practicing it continually. When we hear God's word and understand it, we need to continually practice it even if we don't see immediate results. The fruit will come! We and all around us will benefit. Are you holding on to God's word and practicing it? If you are you will bear fruit in any circumstance. You will be like the person Jeremiah describes in Jeremiah 17:7-8 "Blessed is the man who trusts in the Lord, whose trust is the Lord. He is like a tree planted by water, that sends out its roots by the stream, and does not fear when heat comes, for its leaves remain green, and is not anxious in the year of drought, for it does not cease to bear fruit." (Reminder: please read the scriptures sited.)