The phrase "trust in the Lord with all your heart" means putting complete confidence, faith, and reliance on God alone, without reserving any part of one's trust for anything else. It implies a full surrender of one's will, mind, and feelings to the Lord, acknowledging Him as the sole source of wisdom, guidance, and strength. Trusting with "all your heart" means giving God the total claim to rule one's life, leaving no room for self-reliance or partial trust in one's own understanding. This kind of trust is rooted in God's faithfulness, love, mercy, and truth, and leads to peace, guidance, and a secure life under His care.
