In all our daily choices, we either "sow to the flesh" or "sow to the Spirit" (Gal. 6:8). With our actions and thoughts, we plant seeds that affect what kind of person we're growing into and the level of impact our lives will have for God.
"The flesh" is the part of us that wants to live and act independently of the Lord. As humans, all of us have to deal with the pull of this attitude; we don't lose it automatically when we're saved. However, the Holy Spirit frees us from slavery to the flesh. He begins to change us so we can turn from the deceptive lure of living for self and instead start to live according to the truth. The choices we make contribute to the process of transformation, and when they're in alignment with the Spirit's work, they plant good seed that results in even more new growth.
When you're sowing to the Spirit, you're accepting God's truth into your mind and heart. Then you'll begin to experience eternal life, which comes from truly knowing the Lord (John 17:3). The fruit of the Spirit grows naturally from these seeds of godly truth and influences every aspect of your life. When you feed your spirit with the things of God, you're going to become stronger, more Christlike, and more full of His life in your thoughts and actions.
Are you feeding your spirit and the wellspring of your life, or are you feeding the part of you that wants to act independently of God? Do your choices sow seeds that are building you up, making you different, and letting streams of living water flow from you to nourish others (John 7:37-39)?