Passage
Open ye the gates, and the righteous nation which keepeth faithfulness shall enter in.
Open ye the gates, and the righteous nation which keepeth faithfulness shall enter in.
Isaiah 26:1 In that day shall this song be sung in the land of Judah: We have a strong city; salvation doth he appoint for walls and bulwarks.
Isaiah 26:2 Open ye the gates, and the righteous nation which keepeth faithfulness shall enter in.
Isaiah 26:3 Thou wilt keep in perfect peace the mind stayed [on thee], for he confideth in thee.
Isaiah 26:4 Confide ye in Jehovah for ever; for in Jah, Jehovah, is the rock of ages.
The verse centers on "faith", "open", "gates", "righteous", "nation", "keepeth", "faithfulness", and "shall". It is saying that the verse draws attention to "faith" and "open", so its meaning should be read from those terms before moving to application.
The nearby context moves from verse 1's "In that day shall this song be..." into verse 3's "Thou wilt keep in perfect peace the...", so "faith" and "open" belong inside that flow. In Isaiah context, the local focus is the Holy One of Israel, judgment and restoration, the servant of the LORD, and Zion's hope.
A plain takeaway is to answer the verse's own emphasis on "faith" and "open" with trust shaped by these words, not by a vague optimism outside the passage.