Shared ground
The speaker describes a threatened life marked by constant displacement (“wanderings”) and real sorrow (“tears”). The text’s explicit claim is that God keeps close track of both: the movements are “numbered,” the tears are pictured as kept in a “bottle,” and they are “in your book” (a recorded account, not forgotten).
On that basis, the speaker expects a reversal in the conflict: on the day he calls out, his enemies will turn back. The final line states the speaker’s settled conclusion: “God is for me.” The logic in the passage moves from God’s attention (v.8) to expected intervention (v.9).
Where interpretation differs
Some readers take “wanderings” mainly as physical flight from danger; others hear it more broadly as an unstable, anxious life (including inner unrest). Both fit the poem’s setting of pressure from enemies, but they differ on whether the word points first to geography or to emotional turmoil.
Some also differ on how to read “bottle” and “book.” One reading treats them as vivid poetry for God’s perfect memory and care. Another sees them as imagery that implies a more formal divine record—like a ledger—where suffering is “counted” with future action in view.
A final difference is about timing in v.9: whether the enemy “turning back” is expected to happen immediately when the speaker calls, or whether it is confident language for what God will do in due time.
Why the disagreement exists
The passage uses concrete images (counting, bottle, book) that can be read either as everyday metaphors for careful attention or as hints of an official record that supports later action. Also, the poem compresses time (“in the day that I call”) in a way that can express either quick rescue or strong certainty without specifying the schedule.
What this passage clearly contributes
It presents God as personally attentive to suffering at the level of details—movements and tears. It also ties prayer to the turning point of the conflict: the speaker expects that calling on God is connected to the enemies’ retreat. Finally, it frames the speaker’s confidence not in his own strength but in God’s stance toward him (“God is for me”), a claim echoed elsewhere in Scripture (compare Romans 8:31).