Passage
Mischiefs <FI>are<Fi> in its midst. Fraud and deceit depart not from its street.
Mischiefs <FI>are<Fi> in its midst. Fraud and deceit depart not from its street.
Psalms 55:9 Swallow up, O Lord, divide their tongue, For I saw violence and strife in a city.
Psalms 55:10 By day and by night they go round it, on its walls. Both iniquity and perverseness <FI>are<Fi> in its midst,
Psalms 55:11 Mischiefs <FI>are<Fi> in its midst. Fraud and deceit depart not from its street.
Psalms 55:12 For an enemy reproacheth me not, or I bear <FI>it<Fi> , He who is hating me Hath not magnified himself against me, Or I hide from him.
Psalms 55:13 But thou, a man--as mine equal, My familiar friend, and mine acquaintance.
The verse centers on "mischiefs", "midst", "fraud", "deceit", "depart", and "street". It is saying that the verse draws attention to "mischiefs" and "midst", so its meaning should be read from those terms before moving to application.
The nearby context moves from verse 10's "By day and by night they go..." into verse 12's "For an enemy reproacheth me not or...", so "mischiefs" and "midst" belong inside that flow. In Psalms context, the local focus is worship, trust, the LORD's kingship, and covenant mercy.
A plain takeaway is to answer the verse's own emphasis on "mischiefs" and "midst" with trust shaped by these words, not by a vague optimism outside the passage.