From Greek baptizien:
To affect thoroughly for purification, to renew or establish a relationship with
God.
Implication:
Jesus was baptised on the cross at Calgary because He was thouroughly affected by 'the payment of the ransom held by Satan for humanities sin' and His love was purified (void of hate), and humanity could now renew or establish a relationship with Him;
God; our
Father; our Creator.
"And I myself did not know him, but the
one who sent me to baptize with water told me, ‘The man on whom you see the Spirit come down and remain is the
one who will baptize with the Holy Spirit.’"
John 1:33 NIV