Related Bible passages perhaps worth mentioning:

Jesus said, "The wind blows where it wishes and you hear its sound, but you do not know where it comes from or where it goes.” John 3:8a

To disciples who already had faith in him, Jesus said, "But you will receive power when the Holy Spirit has come upon you...." Acts 1:8

"Now there are varieties of gifts, but the same Spirit ... who apportions to each one individually as he wills.... But earnestly desire the higher gifts." 1 Cor. 12