Psalm 35 is a lament, a passionate plea for help against enemies. In verse 22, the speaker is urgently appealing to God, Yahweh, for intervention. Let's break down the meaning:

"You have seen it, Yahweh." This is a statement of confidence that God is aware of the speaker's situation. "It" refers to the injustice, the persecution, the suffering inflicted by the enemies described earlier in the psalm. The speaker is sure God has observed all of it.

"Don’t keep silent." This is a plea for God not to remain inactive or unresponsive. Silence in this context is interpreted as God's inaction, or seeming lack of involvement. The speaker fears that God's silence means abandonment or indifference to his plight. He wants God to speak out, to take action, to show his power on the speaker's behalf.

"Lord, don’t be far from me." The speaker is expressing a deep fear of abandonment by God. He fears feeling alone and vulnerable in his struggle. He is begging for God's continued presence and support. He doesn't want to feel God is distant either physically or emotionally.

In summary: The verse is a desperate cry for divine intervention. The speaker is confident that God is aware of the injustice they are facing, and they are pleading with God not to remain silent or distant, but to actively intervene and be near to them during this time of hardship.

Key Concepts:

Lament: This psalm is a lament, a common form of prayer in the Hebrew Bible where the psalmist cries out to God in distress.
Theodicy: The psalm touches on the challenge of theodicy - the problem of reconciling God's justice and goodness with the existence of suffering.
Divine Sovereignty: The speaker acknowledges God's power and ability to act, but also expresses fear that God may choose not to intervene.
Importance of Prayer: It demonstrates the importance of bringing one's concerns and anxieties to God in prayer.

This verse reflects a deep personal relationship with God and the belief that God is a personal God who cares about the suffering of His people.