The lyrics of the song, Freely, Freely (God forgave my sin), that I learned in Sunday School during my youth is as follows:

God forgave my sin, in Jesus name
I’ve been born again, in Jesus name
And in Jesus name, I come to you,
To share his love, as he told me to
He said, “Freely, freely, you have received.
Freely, freely, give.
Go in my name and because you believe
Others will know that I live.”

Jesus told his discples, freely you have received, freely give (Matthew 10:8). Giving is an expression of “possession”; of having received from God. What have we received from God? We have received not the spirit of this world, but the spirit which is of God (1 Corinthians 2:12). In other words, those who possess Jesus Christ are the one who can give him freely for the Salvation of others.

Points to ponder:
Only those who have received can give and so the question is, have you received the Spirit of God who is given to all who believe in Jesus Christ? If you have, are you giving freely whom you have received as you have received. Are you/I not only possessing Jesus Christ in us but is He possessing us, which would make us respond by “giving” him freely as we have received. 

Matthew 10:8 (KJV)
8 Heal the sick, cleanse the lepers, raise the dead, cast out devils: freely ye have received, freely give.

1 Corinthians 2:12 (KJV)
12 Now we have received, not the spirit of the world, but the spirit which is of God; that we might know the things that are freely given to us of God.