John 3:6  That which is born of the flesh is flesh; and that which is born of the Spirit is spirit.

John 4:24  God is a Spirit: and they that worship him must worship him in spirit and in truth.

John 6:63  It is the spirit that quickeneth; the flesh profiteth nothing: the words that I speak unto you, they are spirit, and they are life.

John 16:12-15  I have yet many things to say unto you, but ye cannot bear them now. Howbeit when he, the Spirit of truth, is come, he will guide you into all truth: for he shall not speak of himself; but whatsoever he shall hear, that shall he speak: and he will shew you things to come. He shall glorify me: for he shall receive of mine, and shall shew it unto you. All things that the Father hath are mine: therefore said I, that he shall take of mine, and shall shew it unto you.

2 Timothy 1:7  For God hath not given us the spirit of fear; but of power, and of love, and of a sound mind.