What does Psalm 39:3 mean?

David's resolve not to speak seems to have good motives (Psalm 39:1–2). He was careful not to speak rashly, or to say something inappropriate about God (Proverbs 10:19; 17:28). Specifically, he didn't want to speak when those he perceived as "wicked" could hear (Matthew 7:6; Titus 3:9–11). Yet the pressure of not speaking against his enemies only made him feel more distressed. His heart became hot like it was on fire. He could not stay silent any longer, so he spoke. Wisely, however, he chose to express himself to God in prayer.

It is unwise and unhealthy to refrain from speaking to God. The silence only leads to a troubled heart. Hebrews 4:15 assures believers that the Lord sympathizes with our weaknesses, one of which is surely our inability to understand why suffering is part of our life. Instead of trying to refuse to express how we feel, we should take our concerns to the Lord in prayer. Philippians 4:6–7 counsels: "Do not be anxious about anything, but in everything by prayer and supplication with thanksgiving let your requests be made known to God. And the peace of God, which surpasses all understanding, will guard your hearts and your minds in Christ Jesus."

Perhaps in a comparable situation, the psalmist Asaph (Psalm 73:1–3) expressed his frustrations to God. That eventually led him to a reassurance of God's ultimate justice (Psalm 73:15–18).