So a baby is "born again", if it's had some water splashed on it's head?What do you make of Cornelius? Didn't he receive the Holy Spirit prior to baptism?
LT, of the "Reformed doctrine" class
How God distributes his gifts
Jesus promised he would not leave us orphans (John 14:18) but would send the Holy Spirit to guide and protect us (John 15:26). He gave the sacraments to heal, feed, and strengthen us. The seven sacraments —baptism, the Eucharist, penance (also called reconciliation or confession), confirmation, holy orders, matrimony, and the anointing of the sick—are not just symbols. They are signs that actually convey God’s grace and love.
The sacraments were foreshadowed in the Old Testament by things that did not actually convey grace but merely symbolized it (circumcision, for example, prefigured baptism, and the Passover meal prefigured the Eucharist. When Christ came, he did not do away with symbols of God’s grace. He supernaturalized them, energizing them with grace. He made them more than symbols.
God constantly uses material things to show his love and power. After all, matter is not evil. When he created the physical universe, everything God created was "very good" (Gen. 1:31). He takes such delight in matter that he even dignified it through his own Incarnation (John 1:14).
During his earthly ministry Jesus healed, fed, and strengthened people through humble elements such as mud, water, bread, oil, and wine. He could have performed his miracles directly, but he preferred to use material things to bestow his grace.
In his first public miracle Jesus turned water into wine, at the request of his mother, Mary (John 2:1–11). He healed a blind man by rubbing mud on his eyes (John 9:1–7). He multiplied a few loaves and fish into a meal for thousands (John 6:5–13). He changed bread and wine into his own body and blood (Matt. 26:26– 28). Through the sacraments he continues to heal, feed, and strengthen us.
http://www.catholic.com/library/pillar.asp
Baptism is indeed an important sacrament, and we all know if its mention in the bible with John the Baptist.
However there is a bit of "grey" so to say...
One can also be baptised in Christs church and become one in his body with baptism of "desire" , desire to know the truth and to be baptised by following the laws of ones heart that God placed in them.
The Holy Spirit guides you into all fullness and truth, if you follow him.
God Bless
Evanescence