The Hebrew word batach — to trust, to be confident, to be secure — appears over 100 times in the Old Testament, frequently paired with warnings against trusting in human strength, military power, or human planning. Psalm 20:7 contrasts two orientations: "Some trust in chariots, and some in horses: but we will remember the name of the LORD our God." Chariots and horses were the most powerful military technology of the ancient world. Trusting in them is not foolishness — they work most of the time. The psalm is not saying human means are worthless. It is identifying where final security actually lives.
James 4:13–15 addresses the planner directly: "Go to now, ye that say, To day or to morrow we will go into such a city, and continue there a year, and buy and sell, and get gain: Whereas ye know not what shall be on the morrow... For that ye ought to say, If the Lord will, we shall live, and do this, or that." The rebuke is not against planning — it is against planning without the acknowledgment that outcomes belong to God. The phrase "if the Lord will" — the deo thelontos — is not fatalism. It is the honest recognition of who holds what we spend our energy trying to hold ourselves.
Commentary is from a charismatic Protestant perspective, drawing on KJV text and public-domain sources including Spurgeon, Andrew Murray, and Matthew Henry.