Forasmuch then... — More accurately, If then.
Unto us, who believed on the Lord Jesus Christ. — The Greek construction gives a somewhat different meaning: If then God gave to them an equal gift as to us, upon their believing... That condition was sufficient in their case for the greater gifts, and their admissibility to baptism and to general fellowship followed naturally as a thing of course.
What was I, that I could withstand God? — The Greek gives a complex question, Who was I? Able to withstand God? — i.e., How was I, being such a one as I am, able to withstand?