Why was baptism still practiced at every conversion in Paul's early days?

Baptism was still practiced at every conversion because Paul's early ministry was in a transition period. During those early days, water baptism remained part and parcel whenever he had a convert, practiced the moment she believed. As Paul later received deeper and fuller revelations, the importance of baptism dropped away.

Les explains that this was still the transition period, so baptism in Paul's early days was still part and parcel every time he had a convert. He points out that this will also appear with the Philippian jailer in the next few minutes. Les maintains that as Paul goes on into his deeper and fuller revelations, the importance of baptism sort of drops away, though he notes many people will not agree with him. In this case, Paul still practiced water baptism the moment Lydia believed, after her heart was opened and she attended to the things Paul said.

Was baptism always part of Paul's early converts' conversion?

In Paul's early ministry, water baptism was part and parcel of every conversion, as seen with the woman whose heart was opened; she believed when she was baptized. The Philippian jailer is another example. However, as Paul received deeper and fuller revelations, the importance of baptism gradually diminished, though many disagree.