The psalmist draws a picture for us of a tree in a dry climate, which thrives because it is planted near a constant supply of water. This reminds me of John 15 which compares us to branches which need to be connected to the vine in order to bear fruit. Either way, a tree does not bears fruit for itself, but for others. Our abiding in Christ, drinking deeply from the source of living water, is not for our benefit only. It is about sharing that richness, about bearing fruit so that others may be blessed through us. This is MISSIONS!
If you delight in the Word of God and meditate on it day and night you will yield your fruit in season. You will be a fruitful person. O for more fruitful people! You know them. They are refreshing and nourishing to be around. You go away from them fed. You go away strengthened. You go away with your taste for spiritual things awakened. Their mouth is a fountain of life. Their words are healing and convicting and encouraging and deepening and enlightening. Being around them is like a meal. This is the effect of delighting in the Word of God and meditating on it day and night. You will yield fruit in season.