Sins And Transgressions

Sins: all prohibited things which you do with premeditation: consciously, knowingly.
Some of these are:  Adultery, Fornication, Murder, Theft, Deceit for material gain, or out of hatred without a cause, Hating without a cause (jealousy) etc.

Transgressions: All things prohibited which you could accidentally do, unawares, by mistake.
Some of these are: Accidental waves of hatred towards a person, Accidental intercourse with an engaged or married person: in the event you are a baptized believer and thus a ‘Christian’ and you failed to confirm the person was actually single before you engaged in sexual intercourse (would this error be possible with the holy).

Sins committed before one’s conversion are forgiven during the baptism ritual, executed after an individual has repented, and thus you become holy.

JO1  2: 1 My little children, these things write I unto you, that ye sin not. And if any man sin, we have an advocate with the Father, Jesus Christ the righteous:

JO1  2: 2 And he is the propitiation for our sins: and not for our’s only, but also for the sins of the whole world.  

But sins committed after baptism (would this be possible) shall not be forgiven:   

HEB  10: 26  For if we sin wilfully after that we have received the knowledge of the truth, there remaineth no more sacrifice for sins,

HEB  10: 27  But a certain fearful looking for of judgment and fiery indignation, which shall devour the adversaries.