The psalmist is expressing a personal relationship with the WORD of God. The psalmist is writing a personal conviction about the WORD. This particular verse is one where the depth has yet to be revealed.
1. Thy Word ~ The psalmist is making the WORD of God priority in his life. He discerned the word of God and was not willing to allow anything to take precedence.
2. Have I Hid ~ The psalmist is taking personal responsibility for the WORD he hear and perceived to come form the mouth of God. "Have I Hid" is a statement of receiving, accepting and expecting.
3. In Mine Heart ~ The heart is a very important place. Many of us do not realize that spiritually and scripturally the heart and mind are one in the same. Because the psalmist is hiding the word in his heart, he is preparing to meditate on the word. So a man thinketh in his heart, so is he (Proverbs 23:7).
4. That I Might Not Sin Against Thee ~ When the psalmist makes this declaration and decree, they are stating that because the word is within them, it will keep them from sinning against God. The word being a part of us, individually and corporately, will cause us to be free from sin. Yes, free from sin. Any word coming from the mouth of God is TRUTH and because you know the TRUTH by His WORD you will be set, made and continually free, John 8:32.
Psalm 119:11 will have the same meaning. Let's take this verse and actually apply it to our life. Hide His word in your heart and allow the word to keep you from sin.