Only a foolish man thinks he can hide anything from the Lord. This includes his thought life. The Lord knows all man’s thoughts (1 Chronicles 28:9) which includes the good (Malachi 3:16) and the bad (Psalm 94:11). David expressed this truth to the Lord when he said, “Thou knowest . . . my thought afar off. . . . For there is not a word in my tongue, but, lo, O LORD, thou knowest it altogether” (Psalm 139:2-4). The Lord Jesus Christ often exhibited this capability during His earthly ministry (Matthew 12:25; Luke 5:22; Luke 6:8; Luke 9:47; Luke 11:17). Even the written word of God reveals this ability by being “a discerner of the thoughts and intents of the heart” (Hebrews 4:12).
Throughout history, various motives have moved men to sing unto the Lord. Some men sang as a testimony of some specific thing God had done for them (Exodus 15:1; Psalm 126:1-2). Others sang in order to teach truths set forth in the word of God (Colossians 3:16; Psalm 101:1). Some even sang songs that would testify against them in times of disobedience (Deuteronomy 31:19). Though some things have changed throughout history, God’s people still should sing songs of personal testimony like My Jesus, I Love Thee; songs that teach like Holy and Reverend Is the Name; and songs that witness against disobedience like He Was Not Willing.
