“But ye shall receive power, after that the Holy Ghost is come upon you: and ye shall be witnesses unto me both in Jerusalem, and in all Judaea, and in Samaria, and unto the uttermost part of the earth.”  Acts 1:8

The Bible says:
“We then, as workers together with him, beseech you also that ye receive not the grace of God in vain.”  2 Corinthians 6:1
We are workers together with God; he’s working and we are working with him:
“But Jesus answered them, My Father worketh hitherto, and I work.”  John 5:17
He’s the Lord of the harvest and he has sent us into his ready harvest:
“Then saith he unto his disciples, The harvest truly is plenteous, but the labourers are few;”  Matthew 9:37
He knows the tools we require to bring in the harvest with ease and successfully, and he made it clear back then just like he is doing today:
“And they went forth, and preached every where, the Lord working with them, and confirming the word with signs following. Amen.”  Mark 16:20
“God also bearing them witness, both with signs and wonders, and with divers miracles, and gifts of the Holy Ghost, according to his own will?”  Hebrews 2:4
Causing changes; doing good in the lives of unbelievers is a requirement in bringing them in- God thought so when he sent Jesus:
“How God anointed Jesus of Nazareth with the Holy Ghost and with power: who went about doing good, and healing all that were oppressed of the devil; for God was with him.”  Acts 10:38
Now that you have received the Spirit, won’t you work with him today? He’s always ready- are you?