Shared ground
Psalm 138:6 presents a deliberate contrast. Yahweh is “high” (exalted in status), yet he still pays attention to “the lowly.” His greatness is not pictured as making him distant from people who are socially small or personally humble.
The second line balances that claim: Yahweh “knows” the proud “from afar.” The point is not that God lacks information about the proud, but that pride does not result in closeness or favor. The verse ties God’s “height” to two different relational outcomes: attention toward the lowly, distance toward the proud.
Where interpretation differs
Some read “lowly” mainly as an inner posture: humility, dependence, and a realistic self-assessment before God. Others read “lowly” mainly as a social condition: people of low rank, the vulnerable, or those pushed down by the powerful. Many interpreters treat it as intentionally broad, including both.
A second difference concerns “knows from afar.” Some take it as emotional and relational distance (God withholds close fellowship and favor). Others take it more as vantage-point language: from his exalted position God “recognizes” the proud without granting them access.
Why the disagreement exists
The key words allow more than one natural sense. “Lowly” can describe social status or an attitude. “Knows” can mean simple recognition or a more personal kind of relating. “From afar” can describe distance in relationship or distance in viewpoint. The verse is poetic and compact, so it does not spell out which nuance is primary.
What this passage clearly contributes
Explicitly, the verse claims Yahweh is exalted and yet attentive to the lowly, while the proud experience distance rather than nearness. Theologically inferred from that contrast is a consistent portrait of God whose greatness does not block his care, and whose awareness of human pride does not equal approval. The line also supports the psalm’s broader theme that God’s help reaches people in trouble rather than only those with high status (see Psalm 138:7).