God's work in your life depends on His teaching you to pray. The Spirit's intercession for us informs our understanding. I suppose the Spirit prays things for me without my understanding. I want God to help me keep my job, but the Holy Spirit is praying for me to learn to trust God to care for my family. He may even be praying for God to move me to a place where I will have a greater witness. However, the primary way the Spirit prays in me includes growing my understanding. He shows me Scripture verses or simply whispers into my heart. In John 15:15 Jesus said He no longer calls us servants because a servant does not know what his master is doing. He works in me, teaching me to pray for things that I would never have longed for without His intervention in my life including my thinking and praying.