When a believer meditates upon the things of God, those truths become more firmly planted in the heart. Eventually, the contents of the heart become evident from the words that escape the mouth (Luke 6:45). Therefore, the meditations of our heart will eventually be the words of our conversations. This is exactly the truth conveyed by Asaph in our passage from Psalm 77. He understood that meditation upon the work of God would eventually cause him to talk of God’s doings. It is right for God’s people to speak truth, especially when it concerns testifying to the truth of God’s holy words. Yet, this is not possible unless a believer first hides the words of God in his heart (Psalm 119:11), and one way to do so is through meditation.
The passage may appear to directly equate obedience and submission together, but each word conveys a separate and distinct concept. Although today's passage includes both obedience and submission, it is important to recognize that these two words involve separate acts. Earlier studies noted a twofold definition of obedience: first, having an attentive ear, followed by acting upon what has been said. Dividing submission into two parts helps to better understand it too (sub + mission). The prefix sub means under (thus a submarine travels under the water), and the root word mission means to be sent out. Obedience, therefore, emphasizes the act of hearing and doing, while submission emphasizes the act of placing oneself under the authority of another.
