The spirit contains the function of the conscience, although this does not mean that the spirit is the conscience. We can see this from the following verses:

"For Jehovah your God hardened his spirit" (Deut. 2:30).
"Jehovah...saves those who are contrite in spirit" (Psa. 34:18).
"Renew a steadfast spirit within me" (Psa. 51:10).
"When Jesus had said these things, He became troubled in His spirit" (John 13:21).
"His spirit was provoked within him as he beheld that the city was full of idols" (Acts 17:16).
"For you have not received a spirit of slavery bringing you into fear again" (Rom. 8:15).
"The Spirit Himself witnesses with our spirit that we are children of God" (Rom. 8:16).
"For I,...present in the spirit, have already judged, as if being present, him who has thus done this" (1 Cor. 5:3).
"I had no rest in my spirit" (2 Cor. 2:13).
"For God has not given us a spirit of cowardice" (2 Tim. 1:7).

The spirit has the function of intuition, or consciousness. We can see this from the following verses:

"The spirit is willing" (Matt. 26:41).
"Jesus, knowing fully in His spirit" (Mark 2:8).
"And He groaned deeply in His spirit" (Mark 8:12).
"Jesus...was moved with indignation in His spirit" (John 11:33).
"This man...being fervent in spirit" (Acts 18:25).
"I am going bound in the spirit to Jerusalem" (Acts 20:22).
"For who among men knows the things of man, except the spirit of man which is in him?" (1 Cor. 2:11).
"For they refreshed my spirit and yours" (1 Cor. 16:18).
"Because his spirit has been refreshed by all of you" (2 Cor. 7:13).

The spirit has the function of fellowship, or worship. We can see this from the following verses:

"And my spirit has exulted in God my Savior" (Luke 1:47).
"The true worshippers will worship the Father in spirit and truthfulness" (John 4:23).
"For God is my witness, whom I serve in my spirit" (Rom. 1:9).
"We serve in newness of spirit" (Rom. 7:6).
"You have received a spirit of sonship in which we cry, Abba, Father!" (Rom. 8:15).
"The Spirit Himself witnesses with our spirit" (Rom. 8:16).
"But he who is joined to the Lord is one spirit" (1 Cor. 6:17).
"I will pray with the spirit" (1 Cor. 14:15).
"If you bless with the spirit" (1 Cor. 14:16).
"And he carried me away in spirit" (Rev. 21:10).