Thomas Brooks emphasizes the importance of continuous prayer in a Christian's life, illustrating that one can maintain a praying disposition regardless of circumstances such as prosperity or adversity. He highlights the various needs that drive us to prayer, including mercy, grace, and wisdom, and how prayer serves as a vital connection to God, bringing comfort and strength. Brooks describes prayer as the 'regal gate' through which God enters our hearts, enhancing our faith, hope, and overall spiritual well-being.