God is a Spirit, and they that worship Him must worship Him in spirit and in truth. When you stop concentrating on the Word, you stop worshipping. Worship demands concentration, learning, understanding. Your ability to worship depends on what you understand about God, about Christ, and about the Holy Spirit. It depends on how well you understand God's plan for your life and how you are to function as a believer.
Worship includes singing, giving, praising, teaching, and other activities.
Worship can be accomplished privately, alone with onesself, or with a group of other Christians. God gave to Paul the knowledge of His grace so that Paul could communicate it to people. The first instance was during his desert experience shortly after his conversion. Especially in this passage, he points out that there is no excuse for ignorance. As I wrote afore in few words.