spirit

Please discuss meaning of Spirit in 1 Peter 1:11

Please discuss meaning of Spirit in 1 Peter 1:11

What are the possible renderings of ‘Spirit of Christ” in 1 Peter 1:11 –

(BLB) inquiring into what or what manner of time the Spirit of Christ
in them was signifying, testifying beforehand of the sufferings of
Christ and the glories after…