Christopher Blackwood, a Particular Baptist minister, said the following regarding infant baptism:
“It fills the conscience with scruples. Some question whether they were ever baptized. Some question how could I make a covenant by myself, much less by others, being an infant. Some think there is no word at all for what is herein done, but it’s only a laudable Apostolic tradition. Some think it a sign of faith in present, others in infants. But that which causeth most scruple is, about the formalis ratio, the formal cause that [entitles] a man to this infant baptism. Some think the faith of the parents, or of those that offer them, doth [entitle] them hereto. Others think that the faith of their Grand-father, great-grandfather to many generations if none be neerer, that were godly of the race, the faith of Noah shall serve. Others think the faith of the whole Church. Others think that Children’s seminal faith makes them capable hereof, the nature whereof who can understand, seeing all faith requires an act of the understanding which infants have not. Some think Abraham’s faith doth it. Some think there is an inward covenant which was made to Abraham, whereby whatsoever God is to a godly man, he is the same to all the seed. Nay say others; seeing many of the godly’s seed are wicked, this is impossible but there is a certain outward covenant, formerly in circumcision, now in baptism whereby infants do partake. Talk with ten men, and you shall see them divided into five parts about the formal cause that entitles an infant to baptism. It’s a speech of Erasmus, ‘Things are bad where there is need of so many remedies.'”
Blackwood was educated at Cambridge and ordained in the Church of England. He renounced infant baptism in 1644. This is from his book, The Storming of Antichrist, published the same year.